# Pastebin 8vH0tGfL
input:

   [ recording_mbids ]    
   
output:

   [ 
      {
        release_group_mbid: ...,
        releases: [
           { 
               release_name: ...
               release_mbid: ...
               recordings: [                                                                                                       
                   {'duration': ...,                                                                       
                    'position': ...,                                                      
                    'recording_mbid': ...,                         
                    'recording_name': ...,  
                    'medium_position': ...
                   }
               ]
           }
        ]
      }
   ]