{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748628228",
    "entityType": "Track",
    "nonce": "0x6f962049c813ff05ea991d0aff638edcbc52105e59067fb52b861ec5fafc5d3e",
    "signature": "0xf5863cbb44e42ce6c54bc7d0100d14523e525864c58c8636e077023d4d069cc51ae72652959d628edcffff7aad994ee99570ae1f6211739ef85d23ce605b36c71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}