Playlist data below for anyone interested:

https://music.apple.com/includes/ipod/data/us/en-US.json

There appears to be different URLs for different territories. For anyone curious, I've fed a few of them into an agent and they are largely consistent.

US 1,029 Songs 682 Artists 39 Unique tracks

GB 1,156 Songs 727 Artists 12 Unique tracks

FR 1,217 Songs 797 Artists 132 Unique tracks

DE 1,062 Songs 709 Artists 62 Unique tracks

ES 1,155 Songs 724 Artists 7 Unique tracks

Huh! Alright, that explains why this damned thing had so much music from my own Apple Music library yet was missing so much more! I’m mildly disappointed that it doesn’t just load a user’s Apple Music library.

[dead]