{
  "manageEntity": {
    "action": "Save",
    "entityId": "789130",
    "entityType": "Track",
    "nonce": "0xceaf730c130b8323f641c98a132a285edcfb617883f419fd001cf786477bbb8d",
    "signature": "0xb9a6c921e7be2f24a38c9d4d101e615be4e3be6d1eb38ecdfd5077a24b97fccd458abb7daedd7575626a73bef93a93cf56a5e6e91b320131165c66c94185aa211c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}