{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054916589",
    "entityType": "Track",
    "nonce": "0xa062c608ab11cbf0e61c1c338e019cd5ef62bad22cf678abe19e9813e176dadc",
    "signature": "0xf68d254c9cba71327449e6f960e22f556262098a6d6c7fefe117d211c96d17a842ca39361c7c063191313f05eee594d4cf391bf7a3a7ee93e4d5a5f382ede3e91b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}