automatically adding artists' subscriptions via python-musicbrainz2 or musicbrainzngs

Dear all,

I generated a huge list (python pickled) of artists' IDs to which I want
to subscribe. Unfortunately, I cannot find the entry to do this.
Obviously, with python-musicbrainzngs I can add them to my collection,
but I want to subscribe to them.

Any comments, tips, and remarks are highly appreciated.

Best wishes,
Max