{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739894776",
    "entityType": "Track",
    "nonce": "0x1ca715cb7be97a003911175bcc8e35c252293b7c8623d419bcd3a36e9bbee9b7",
    "signature": "0xc55cffca49829921c8049459db8561b9e602175d8f7894404dfc2be1b39a735f61947a62c075f22ad1420d78548aa61ac6d1e8741028cdc9fdeabdc36b68f7bc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}