{
  "manageEntity": {
    "action": "Save",
    "entityId": "345506139",
    "entityType": "Track",
    "nonce": "0xa5a6bbee6b3bcdcd794487e8896e3945804c2a33ef47b4df7015723707b4c43d",
    "signature": "0x1846959c75b7943781eb76f91bdba9f5e5f16df2d70273adf3cab5665b8e9d1f4a547fb971721160a3784cd88c8ac5962892c4f9ea91fc6df01d45e6219a31a31b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}