Usage: playlistsongadd playlist_id={playlist_id} url={url} [invoker={loader/provider}]

Permissions:
  i_playlist_song_add_power

Description:
  Adds a new song entry to the playlist.
  Playlists (e.g. from YouTube) will be resolved automatically!)

Example:
  playlistsongadd playlist_id=13 url=https://www.youtube.com/watch?v=XU8iCAxAsH4
  song_id=1
  error id=0 msg=ok
