Hi. Style / Unknown and untitled / Special purpose artist - MusicBrainz lists a [soundtrack] SPA but no such artist exists (there’s a few more like this). Should I use [theatre] - MusicBrainz instead for an unknown soundtrack recording artist or use the release artist?
The soundtrack in question is Release group “הלהקה” by הלהקה - MusicBrainz. Someone already added הלהקה - MusicBrainz as the recording artist, but as other musical casts, I don’t think it should exist.
It says “You can use one of the following as the artist credit” 
(not an artist)
So [unknown] - MusicBrainz credited as [soundtrack]?
Should I merge הלהקה - MusicBrainz with [unknown] - MusicBrainz?
Is that an entirely made up artist to match the film name? If so, that would seem fine. If the performer is unknown, I’d just use [unknown] for the recording personally, I don’t see a big reason to use [soundtrack] there since I don’t think it provides any useful additional information.