{
  "manageEntity": {
    "action": "Update",
    "entityId": "645199904",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1cfe5cf0b916c65514a3ac0da8594062c6150c57478da1f1ed7d28dba4a57c73",
    "signature": "0x4b9d7d9c5792485d9371e7a354142dfbedc3ed5964dff983eb0e6ecc95e6b2a77d440b59a68b3f4eb461499c60c6a229656bb65e0e1013ff960a69f835609baa1c",
    "signer": "0x2607197F4148fb3F95c8e4b03827e63b3457A751",
    "userId": "645199904"
  }
}