Tracks added; 0 when nothing resolved, which still succeeds.
Row of each added track, in the order they were added.
Index of the playlist.
Unique identifier of the playlist, formatted as {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}. Pass as playlistGuid to reliably target this playlist.
Always true here; a failed call resolves with ApiFailure instead.
Successful response from
playlist.addPathsSequential.