Rating

setGenreRate(sid, genreId, rate);

setAlbumRate(sid, albumId, rate);

setTrackRate(sid, trackId, rate);

getGenreRate(sid, genreId);

getAlbumRate(sid, albumId);

getTrackRate(sid, trackId);

deleteGenreRate(sid, genreId);

deleteAlbumRate(sid, albumId);

deleteTrackRate(sid, trackId);