{
  "manageEntity": {
    "action": "Save",
    "entityId": "1582735917",
    "entityType": "Track",
    "nonce": "0x7508f27ff215087e4997d13097894e2885084f237e2942d6906feebfeb5fc5ca",
    "signature": "0x8591a8f455a44c7b9e2dea301d62c5823e46428580f27dc244c4b77bcd46f2af1005bdfe8d5cf7ccb78e2aae56a6ddfdacb8a31cc5549b29e70ebdb1c040a9fc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}