{
  "manageEntity": {
    "action": "Save",
    "entityId": "1684033962",
    "entityType": "Track",
    "nonce": "0x1b8daf21fd38fcca7e975eeda3d6dc524fad6fce5a70b3f545ddf4c556f0f4ce",
    "signature": "0x5b211494f6159d0b324a72326c400d3090d72343b3889e62afcf900fb3d24e9a54b6cb963f36c473c70f2afc94acc23a63494523d8caf39158c39668c9f9c75a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}