{
  "manageEntity": {
    "action": "Save",
    "entityId": "1554682916",
    "entityType": "Track",
    "nonce": "0x35181b434b17f7137e655a32a699cd0aeb1a7b3ae7e1b0bc9214454011b2ed15",
    "signature": "0xb1947e7f4ed784e822897464691a15d9d23672410074fe800a97d585130a96921ccdbc322b65f763ea674ae74769762b054a3068d00f4b27b9837886af1853051b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}