https://www.apple.com/rss/
http://ax.itunes.apple.com/WebObjects/MZStoreServices.woa/ws/RSS/topalbums/limit=12/genre=20/json
https://affiliate.itunes.apple.com/resources/documentation/genre-mapping/
https://itunes.apple.com/WebObjects/MZStoreServices.woa/ws/genres?id=20
https://itunes.apple.com/us/rss/topalbums/genre=20/json