You do NOT need to register or log in to download songs.
Tap the Forums button (Globe icon) on your device.
Choose a music genre (Jazz, Pop, Latin...), or Tap on Main Playlists above.
For example for the Jazz 1410 Standards Playlist, tap on the Jazz genre.
Tap the conversation thread with the playlist or song you want.
Tap the Playlist (or song) link in the post to import.
shows jazz playlist link to import  
The Import Preview window opens, tap Import Playlist.
(When importing playlists, you can use the slider to navigate through its songs to only import one song if desired or to view the songs in the playlist).
Import preview window  
The playlist and its songs will import. 
Showing imported playlist listing in the Playlists area of the library page
Search the Forum information here