{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327998499",
    "entityType": "Track",
    "nonce": "0x88ab1a465a7e85b59059b3f3638b96adaa03d8cc4d51b4132b515c5f71d1112d",
    "signature": "0xbfeadf53acf5ddd8bf17ba2089a44ce31be7c8e93dea957e1c83c2af60f7a5e27d9db32541ed6e7808cae7226adcf5ad33104331860548449931f130f3f746b11c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}