Can confirm, I have used this to grab all my Google Music data before they nuked that. Turns out there's a json file for every single track in your library, and

Can confirm, I have used this to grab all my Google Music data before they nuked that. Turns out there's a json file for every single track in your library, and it contains metrics like play count, start / stop position, playlists, etc. Kinda creepy, but in hindsight it's not unexpected.