{
  "manageEntity": {
    "action": "Update",
    "entityId": "738673571",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraoouejwudam5plve5sphbakb2ygo5sobjjp7luxng4xkeipcxt3ea\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1456915964},{\"type\":\"playlist\",\"playlist_id\":661595794}]}}}",
    "nonce": "0x48e94d6ffc686d7de16d4c030292163e4c2d694c6eb576f2cc096ab618935254",
    "signature": "0xa0cb2742be989620e6b19b3a9dd892304579d6f61d19b171d73b926f01f6a1990245f97a9df1a0806f57ae5ed42173da630547c78f1f97fc20eea7b62dc59b7e1c",
    "signer": "0x9FA029c6E43fD9781215e024e9ae5802602Ed2Db",
    "userId": "738673571"
  }
}