{
  "manageEntity": {
    "action": "Save",
    "entityId": "1527378865",
    "entityType": "Track",
    "nonce": "0xf751edc8f1b4684666c862b89c10bdbaafa316cff978a35914530e6f06df7e66",
    "signature": "0xfe9ad484a1ab768edfaa11dd2001eac239d13875ee9657f9356d01cfc5b4240b677be4d4472535df8308e4cfc433e73d429e6e451d82c4b592c0b651ed9878f81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}