{
  "manageEntity": {
    "action": "Save",
    "entityId": "1602083017",
    "entityType": "Track",
    "nonce": "0x05508c43f612938eb916c0065dd1073e629099a02d7ea822a8d007718555c949",
    "signature": "0xd13f70c028f95c00a706ca71e341310ebf5835a4e2d29a3e5b3f71c76ada6b3f1932b9522f28e83fa924bcdb835e90f45f8176a1c2c48564a137b35853b811fc1b",
    "signer": "0xb0bc7585AC84F169814851A3C22d8d92D133337F",
    "userId": "267657235"
  }
}