nostr:npub1yfg0d955c2jrj2080ew7pa4xrtj7x7s7umt28wh0zurwmxgpyj9shwv6vg can you add an `i` tag on zap receipts and comments on a song? spotify has this. you could just copy their format.

spotify:track:54KIAHa71rBTDubyUPwiks is the URI for https://open.spotify.com/track/54KIAHa71rBTDubyUPwiks