{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342073765",
    "entityType": "Track",
    "nonce": "0xa97b003625e7eaa93003ff42c05d3c125c18bf766e121408d80077b380eb924d",
    "signature": "0xb0e54d570489d300846513d29639892c5c59d5d9f238fe361a2bfe90867c17f2383f6226c13e1f94209dd426b588f927d2abb18bad91199097ca68d0490fb9d91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}