{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012499",
    "entityType": "Track",
    "nonce": "0x574aae30732d8af3dacc77e94bff79656c0cd7f5c2b6cfddd0d2be95b9b898aa",
    "signature": "0x644de8d1ca44d06fbae7f8d1475763bdaf101e16cf1ec5031b4808f3d4520ec4100d6ca6d508c3b0036bbfd3190e8dba8c727cdb2a2f68b35b535256c4e68ca21c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}