I start this new thread since the one I had sent the comment is marked as "Bug solved":Parse JSON (sub)structure.
There is no way to know json_select_object found the json object or not. Script is useless in big part of the cases.
Try attached script with different artists (Peter Gabriel, Dire Straits, etc). Pay attention to country name column which is set to artist name in many cases.
Let's hope the competent one would go through this thread. 
MusicBrainz__json__Artist.src (2.43 KB)