Issue Summary:
The recommendations.get API endpoint is returning incomplete data for the Recommendations.TrackSimple object. Specifically, the 'album' field is missing from the response, despite it being documented in the official API documentation. This issue is impacting the ability to retrieve complete information about recommended tracks.

Expected Behavior:
The Recommendations.TrackSimple object should include the 'album' field in the response, as specified in the official API documentation.

Thank you for your attention to this matter.