Backup custom game's manifest

[pegasusearl]

Hello, I was reading https://github.com/mtkennerly/ludusavi/blob/master/docs/help/custom-games.md
It explain how to backup custom game but it doesn't explain how to backup the manifest itself. I think it would be nice if it's also explained there. Where is custom game manifest saved?

UPDATE:
I found where it is, and decided to do this.