{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119873679",
    "entityType": "Track",
    "nonce": "0x4d82596aad18f0407d0703161827778c1138803b3b22ef668ab15e84928c9889",
    "signature": "0x87d782c4dcc8542fc5ada5551c39c5a5c9db21dca5f52ca659e5733a6a350f544ce35fec13c5d837cffeb7f6d85265d2f30ca69dd9a6b80fffd9ac49272c69f71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}