{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490120019",
    "entityType": "Track",
    "nonce": "0x86d3e643cf32725607bade59bec192fc9440e6c15aab64e13815a8f0daacebf4",
    "signature": "0x35f1843c619bfc2bbe4b45495fd4aa64945049e37b3c3590e294a84a1bb788175da49e04a5c582feda3dd14af264b2176b0de81cb0b15436b6af0d398e9bcba01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}