I’m a bit wary about the editing flow. I am not a fan of anything trying to bypass the MB entity editors and their associated validation.
And aside from a few small things like ISRC there are no (public) API endpoints for adding/editing data (AFAIK).
The query/browse flows would not be too hard, I expect - mostly a case of deciding which field(s) of each entity you want to visualise, and how deep you want to go with relationships.