Multiple Subtitles?

I’m looking at adding this release:

Which is a soundtrack for a movie with a name structured like “title: subtitle” and then the soundtrack is named “movie name: subtitle”. How should I structure it for musicbrainz?

Just use colons like this?

Spark: A Burning Man Story: Day + Night

Amazon uses a dash for the second split:

Spark: A Burning Man Story - Day + Night

Something else?

I’d just use two colons