This represents a client-side playlist. This is constructed by
the user of the app, and the contents of the playlist can be
stored (Player.saveClientPlaylist), deleted (Player.deleteClientPlaylist)
and retrieved (Player.fetchClientPlaylists, Player.fetchAudioFilesInClientPlaylist)
from the adaptr servers.
This represents a client-side playlist. This is constructed by the user of the app, and the contents of the playlist can be stored (Player.saveClientPlaylist), deleted (Player.deleteClientPlaylist) and retrieved (Player.fetchClientPlaylists, Player.fetchAudioFilesInClientPlaylist) from the adaptr servers.