{
  "manageEntity": {
    "action": "Save",
    "entityId": "406141",
    "entityType": "Track",
    "nonce": "0xff89cdd356831e6967a5ac6858f1b42f4e263a83e31710da5a8d42b2b30b184d",
    "signature": "0xa2ded6b61f3ec82876587bfb8420ccec21d1388921dd20afb735158da32488847d30d06f2303afafaa9735ec71838f6b4eac70054ddebd6f455e50c1297446a01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}