I have a script which I use, based on the StackExchange API, to regularly download a local backup of various questions relevant to me (the ones I've asked, answered, or favorited) across various SE sites. Recently I noticed that this script stopped downloading favorites. And indeed, the URL https://api.stackexchange.com/2.2/users/17064/favorites?sort=activity&order=asc&site=mathoverflow&filter=bYJ_Djhc_U%29oHdva4ija%29v&min=1661983200 now returns an empty list.
I suppose this is due to bookmarks having been renamed to “saves”, but this doesn't tell me how to actually use this feature programmatically. The API documentation says nothing about favorites being deprecated, nor does it provide a hint as to what the replacement method is or anything of the sort.
So, is there some way I can get something equivalent to the old behavior except by scraping the HTML from https://mathoverflow.net/users/saves/17064?sort=activity which is precisely what I wanted to avoid by using the API?
(Note that I'm fine with a solution that would involve, for example, re-migrating my “saves” to bookmarks if that's in any way possible. I have no objection to them being publicly visible, for example.)