{
  "manageEntity": {
    "action": "Save",
    "entityId": "768920856",
    "entityType": "Track",
    "nonce": "0xf4eca59bfcacbc4b69309c1ed09811568ff98c6b2895d45128a95eca8638992a",
    "signature": "0x03182b01e03d470bdef5fa0d21c0d8e41047618d016737bd6e3b13bd9abd05040337c5c0dd1ee802e5a7be04f7aa14b38e706f06c3bd69177892043401d942771c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}