{
  "manageEntity": {
    "action": "Update",
    "entityId": "549983695",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieracpimq2digzaeuhepjvdob2br2p3aakhd6jcxi5thnyuvucx6fzoa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1797343841}]}}}",
    "nonce": "0x4c590fa1561394d158f22e6b5ef76def8270e528a8fe018f7931def61cb96521",
    "signature": "0x1584074d739f9d7ba92dd946b075c7917133871b71f86a712046d7ebacab762070f60567da5a6bd702116f4c77497605e410a83428c7b69d1d37f005779c44041b",
    "signer": "0x5877F7e1aB261CEa57f1734519117Ed49d50c8c3",
    "userId": "549983695"
  }
}