Actions directement sur le menu :

Spotify Unity

mkdir -p ~/.local/share/applications
cp /usr/share/applications/spotify.desktop ~/.local/share/applications/

Rajouter les lignes suivantes :

[...]
Actions=PlayPause;Next;Previous
[Desktop Action PlayPause]
Name=Lecture/Pause
Exec=dbus-send --print-reply=literal --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.PlayPause
OnlyShowIn=Messaging Menu;Unity;
[Desktop Action Next]
Name=Suivant
Exec=dbus-send --print-reply=literal --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Next
OnlyShowIn=Messaging Menu;Unity;
[Desktop Action Previous]
Name=Précédent
Exec=dbus-send --print-reply=literal --dest=org.mpris.MediaPlayer2.spotify /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Previous
OnlyShowIn=Messaging Menu;Unity;
StartupWMClass=Spotify
Source : http://askubuntu.com/questions/145697/spotify-quicklist-for-unity#answer-346957
 

Avoir une icone de notification correct :

spotify fix ubuntu icon tray

wget --no-check-certificate http://bit.ly/fix-spotify-icon -O - | sh
À refaire en cas de mise à jour...

Source : https://github.com/faviouz/fix-spotify-icon