{
  "manageEntity": {
    "action": "Save",
    "entityId": "131483470",
    "entityType": "Track",
    "nonce": "0x13d2872dc73d08ac5bb442a1b63a7b419551598e4be7c2fe5c00f6f6e367b6b9",
    "signature": "0xfc7060fbab0b62579cc371d2cfbdbc28c33a39fe48b054f907231a97fc56148532c455a86d796b5209e68cca923d5e601fe0d9d50da2969cb705d680a4ec09941c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}