diff --git a/MusicBot/database/__init__.py b/MusicBot/database/__init__.py
new file mode 100644
index 0000000..9d5ff12
--- /dev/null
+++ b/MusicBot/database/__init__.py
@@ -0,0 +1,15 @@
+from .base import BaseGuildsDatabase, BaseUsersDatabase
+from .extensions import VoiceGuildsDatabase
+
+from .user import User, ExplicitUser
+from .guild import Guild, ExplicitGuild
+
+__all__ = [
+    'BaseGuildsDatabase',
+    'BaseUsersDatabase',
+    'VoiceGuildsDatabase',
+    'User',
+    'ExplicitUser',
+    'Guild',
+    'ExplicitGuild',
+]
\ No newline at end of file
diff --git a/MusicBot/database/base.py b/MusicBot/database/base.py
index 05fc6f9..8d7197b 100644
--- a/MusicBot/database/base.py
+++ b/MusicBot/database/base.py
@@ -5,85 +5,98 @@ from typing import Any, cast
 from pymongo import MongoClient
 from pymongo.collection import Collection
 
-from yandex_music import Track
-
-from MusicBot.database.user import User, ExplicitUser, TrackInfo
+from MusicBot.database.user import User, ExplicitUser
+from MusicBot.database.guild import Guild, ExplicitGuild
 
 client: MongoClient = MongoClient("mongodb://localhost:27017/")
 users: Collection[User] = client.YandexMusicBot.users
-        
-def create_record(uid: int | str) -> None:
-    """Create user database record.
+guilds: Collection[Guild] = client.YandexMusicBot.guilds
 
-    Args:
-        uid (int | str): User id.
-    """
-    uid = str(uid)
-    users.insert_one(ExplicitUser(
-        _id=uid,
-        ym_token=None,
-        tracks_list=[],
-        current_track=None,
-        is_stopped=True
-    ))
+class BaseUsersDatabase:
 
-def update(uid: int | str, data: dict[Any, Any]) -> None:
-    """Update user record.
+    def create_record(self, uid: int) -> None:
+        """Create user database record.
 
-    Args:
-        uid (int | str): User id.
-        data (dict[Any, Any]): Updated data.
-    """
-    get_user(uid)
-    users.update_one({'_id': str(uid)}, {"$set": data})
+        Args:
+            uid (int): User id.
+        """
+        uid = uid
+        users.insert_one(ExplicitUser(
+            _id=uid,
+            ym_token=None
+        ))
 
-def get_user(uid: int | str) -> User:
-    """Get user record from database. Create new entry if not present.
+    def update(self, uid: int, data: User) -> None:
+        """Update user record.
 
-    Args:
-        uid (int | str): User id.
+        Args:
+            uid (int): User id.
+            data (dict[Any, Any]): Updated data.
+        """
+        self.get_user(uid)
+        users.update_one({'_id': uid}, {"$set": data})
 
-    Returns:
-        User: User record.
-    """
-    user = users.find_one({'_id': str(uid)})
-    if not user:
-        create_record(uid)
-        user = users.find_one({'_id': str(uid)})
-    return cast(User, user)
+    def get_user(self, uid: int) -> User:
+        """Get user record from database. Create new entry if not present.
 
-def get_ym_token(uid: int | str) -> str | None:
-    user = users.find_one({'_id': str(uid)})
-    if not user:
-        create_record(uid)
-        user = cast(User, users.find_one({'_id': str(uid)}))
-    return user['ym_token']
+        Args:
+            uid (int): User id.
 
-def get_tracks_list(uid: int | str) -> list[TrackInfo]:
-    user = get_user(uid)
-    return user.get('tracks_list')
+        Returns:
+            User: User record.
+        """
+        user = users.find_one({'_id': uid})
+        if not user:
+            self.create_record(uid)
+            user = users.find_one({'_id': uid})
+        return cast(User, user)
 
-def pop_track(uid: int | str) -> TrackInfo:
-    tracks_list = get_tracks_list(uid)
-    track = tracks_list.pop(0)
-    update(uid, {'tracks_list': tracks_list})
-    return track
+    def get_ym_token(self, uid: int) -> str | None:
+        user = users.find_one({'_id': uid})
+        if not user:
+            self.create_record(uid)
+            user = cast(User, users.find_one({'_id': uid}))
+        return user['ym_token']
 
-def add_track(uid: int | str, track: Track | TrackInfo) -> None:
-    tracks_list = get_tracks_list(uid)
-    if isinstance(track, Track):
-        track = TrackInfo(
-            track_id=str(track.id),
-            title=track.title,  # type: ignore
-            avail=track.available,  # type: ignore
-            artists=", ".join(track.artists_name()),
-            albums=", ".join([album.title for album in track.albums]),  # type: ignore
-            duration=track.duration_ms,  # type: ignore
-            explicit=track.explicit or bool(track.content_warning),
-            bg_video=track.background_video_uri
-        )
-    tracks_list.append(track)
-    update(uid, {'tracks_list': tracks_list})
+class BaseGuildsDatabase:
+    
+    def create_record(self, gid: int) -> None:
+        """Create guild database record.
 
-def set_current_track(uid: int | str) -> None:
-    update(uid, {'current_track': str(uid)})
\ No newline at end of file
+        Args:
+            gid (int): Guild id.
+        """
+        guilds.insert_one(ExplicitGuild(
+            _id=gid,
+            tracks_list=[],
+            previous_tracks_list=[],
+            current_track=None,
+            is_stopped=True,
+            allow_explicit=True,
+            allow_menu=True
+        ))
+
+    def update(self, gid: int, data: dict[Any, Any]) -> None:
+        """Update guild record.
+
+        Args:
+            gid (int): Guild id.
+            data (dict[Any, Any]): Updated data.
+        """
+        self.get_guild(gid)
+        guilds.update_one({'_id': gid}, {"$set": data})
+
+    def get_guild(self, gid: int) -> Guild:
+        """Get guild record from database. Create new entry if not present.
+
+        Args:
+            uid (int): User id.
+
+        Returns:
+            Guild: Guild record.
+        """
+        guild = guilds.find_one({'_id': gid})
+        if not guild:
+            self.create_record(gid)
+            guild = guilds.find_one({'_id': gid})
+        return cast(Guild, guild)
diff --git a/MusicBot/database/extensions.py b/MusicBot/database/extensions.py
new file mode 100644
index 0000000..2ab5b62
--- /dev/null
+++ b/MusicBot/database/extensions.py
@@ -0,0 +1,50 @@
+from typing import Any
+from yandex_music import Track
+
+from MusicBot.database.base import BaseGuildsDatabase
+
+class VoiceGuildsDatabase(BaseGuildsDatabase):
+    
+    def get_previous_tracks_list(self, gid: int) -> list[dict[str, Any]]:
+        guild = self.get_guild(gid)
+        return guild.get('previous_tracks_list')
+    
+    def get_tracks_list(self, gid: int) -> list[dict[str, Any]]:
+        guild = self.get_guild(gid)
+        return guild.get('tracks_list')
+
+    def pop_track(self, gid: int) -> dict[str, Any]:
+        tracks_list = self.get_tracks_list(gid)
+        track = tracks_list.pop(0)
+        self.update(gid, {'tracks_list': tracks_list})
+        return track
+
+    def insert_track(self, gid: int, track: Track | dict[str, Any]) -> None:
+        if isinstance(track, Track):
+            track = track.to_dict(for_request=True)
+        tracks_list = self.get_tracks_list(gid)
+        tracks_list.insert(0, track)
+        self.update(gid, {'tracks_list': tracks_list})
+    
+    def add_track(self, gid: int, track: Track) -> None:
+        tracks_list = self.get_tracks_list(gid)
+        tracks_list.append(track.to_dict(for_request=True))
+        self.update(gid, {'tracks_list': tracks_list})
+
+    def set_current_track(self, gid: int, track: Track) -> None:
+        self.update(gid, {'current_track': track.to_dict(for_request=True)})
+    
+    def add_previous_track(self, gid: int, track: Track | dict[str, Any]) -> None:
+        tracks_list = self.get_previous_tracks_list(gid)
+        if isinstance(track, Track):
+            track = track.to_dict(for_request=True)
+        tracks_list.insert(0, track)
+        if len(tracks_list) > 50:
+            tracks_list.pop()
+        self.update(gid, {'previous_tracks_list': tracks_list})
+    
+    def pop_previous_track(self, gid: int) -> dict[str, Any]:
+        tracks_list = self.get_previous_tracks_list(gid)
+        track = tracks_list.pop(0)
+        self.update(gid, {'previous_tracks_list': tracks_list})
+        return track
\ No newline at end of file
diff --git a/MusicBot/database/guild.py b/MusicBot/database/guild.py
index 48c1cbc..6b50099 100644
--- a/MusicBot/database/guild.py
+++ b/MusicBot/database/guild.py
@@ -1,10 +1,18 @@
-from typing import TypedDict
+from typing import TypedDict, Any
 
 class Guild(TypedDict):
+    tracks_list: list[dict[str, Any]]
+    previous_tracks_list: list[dict[str, Any]]
+    current_track: dict[str, Any] | None
+    is_stopped: bool
     allow_explicit: bool
     allow_menu: bool
 
 class ExplicitGuild(TypedDict):
-    _id: str
+    _id: int
+    tracks_list: list[dict[str, Any]]
+    previous_tracks_list: list[dict[str, Any]]
+    current_track: dict[str, Any] | None
+    is_stopped: bool  # Prevents the `after` callback of play_track
     allow_explicit: bool
-    allow_menu: bool
\ No newline at end of file
+    allow_menu: bool  # Is /toggle mnu command available
\ No newline at end of file
diff --git a/MusicBot/database/user.py b/MusicBot/database/user.py
index 98feb7b..7bf8edc 100644
--- a/MusicBot/database/user.py
+++ b/MusicBot/database/user.py
@@ -1,25 +1,8 @@
 from typing import TypedDict
 
-class TrackInfo(TypedDict):
-    track_id: str
-    title: str
-    avail: bool
-    artists: str
-    albums: str
-    duration: int
-    explicit: bool
-    bg_video: str | None
-
 class User(TypedDict):
     ym_token: str | None
-    tracks_list: list[TrackInfo]
-    current_track: int | None
-    is_stopped: bool
 
 class ExplicitUser(TypedDict):
-    _id: str
+    _id: int
     ym_token: str | None
-    tracks_list: list[TrackInfo]
-    current_track: int | None
-    is_stopped: bool  # Prevents callback of play_track
-