{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980684547",
    "entityType": "Track",
    "nonce": "0x7b48695676f81a1ba18c4867813d8e3de7364b71836103345e32a1816885c2b2",
    "signature": "0xaf7e245f68483f1edc269597d9880e2735cf5ffa56ce0f3f4d22750dc1b7b28c4a9537bff5c9ceff834c21e28f58fc8c5360275315d0b31d96730b044f5f2f751c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}