{
  "manageEntity": {
    "action": "Save",
    "entityId": "889549999",
    "entityType": "Track",
    "nonce": "0xefedeb3146a36099a2b9293fc2a53e5e09bec183d09df47114b6de2caddacf15",
    "signature": "0xf7cb87f09afba5bbeeee6200299cb41753016f5987544fd19b7bef4267e8ba8f32e5f5ab01c5e60c18d797ef7c67b2262fd3ab3150b40b42ccd7cded1fdeeb5d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}