{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769302369",
    "entityType": "Track",
    "nonce": "0xf9dd59f4171462ed50c14fad16f23c5a2ba32adf103bb923182b1b1e9a2b4599",
    "signature": "0xecdcea305e1b7c7ede2053896e955b838ed922246c0bbbe699300b7510935c435473b762d34ec96eb796357b82e541655bc20b6af4a48745c6ad4726f1dee6001b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}