Label Grid Tools can add a (Pre)Save link to each Release, allowing the end users to Pre-Save Tracks and optionally follow Playlists, Users or Artists.
The functionality would work as Pre-Save if the release is not currently released and as Save if the release got released.
HOW IT WORK
Spotify (Pre)Save functionality authorize and save the OAuth Spotify infos locally in your WordPress installation.
For Save functionalities, the plugin execute all the configured actions at once.
For Pre-Save functionalities: The plugin store the Customer OAuth details and will execute the “Save” action on release date.