{
  "manageEntity": {
    "action": "Update",
    "entityId": "522902911",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera5ta2fs32qdks4utrobqksyt4is5fmspxx65vm666ixsykjz4fzsq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":555408497}]}}}",
    "nonce": "0x64167a57ea0e6f37fc9558f030175c75d0bcb40dc438e5a78991769d6c1a9e82",
    "signature": "0x8d9f79a94e9f6adaa6c23a8fc89996ac47bc7a8f347ab37032c4d1c1c19ac20368bb76538359bdfab2b51cddb68e51e3e3611863ec23c1b187653b5c11b6af4e1b",
    "signer": "0x064F47ceA1BD6c7f4E75eEaF6208Ca039d0c2D01",
    "userId": "522902911"
  }
}