{
  "manageEntity": {
    "action": "Save",
    "entityId": "766729865",
    "entityType": "Track",
    "nonce": "0x0af9908c2e6c1681ac7ab6b3962f3caaf6d1b88236d7ac2934a54860334b833d",
    "signature": "0xc3eb46e4b08bdf7f2365fb28ec1e8ca02dab40ed8ea026bc79a7fdda171be4b53c77871634517cd9efd1ed825f8419f152b71971d53dda6ce7e9b4093059aadc1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}