{
  "manageEntity": {
    "action": "Save",
    "entityId": "817778",
    "entityType": "Track",
    "nonce": "0x2f519bbf858bd778c615de817e3c53b5c667dc525c06ec260231d7892477d205",
    "signature": "0x8ecf9f067f2174743290738cb38119b7cc930b9e8af25190d5f2eb4a698689ba63500544dd714d2a57814755a5edbfc29616e6b3f7afa18e93f6b067a7833ccb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}