{
  name : "users",
  families : [ {
    name : "info",
    columns : [ {
      name : "track_plays",
      source : "song_id"
    } ]
  } ],
  entityIdSource : "user_id",
  overrideTimestampSource : "play_time",
  version : "import-1.0"
}


Add import descriptor for song-plays
Add import descriptor for song-plays
