{
  "manageEntity": {
    "action": "Save",
    "entityId": "243564671",
    "entityType": "Track",
    "nonce": "0x475036b58ed996fb0cbdf262bb06ea2ef3cf6204d7fdd203d3cde86845f01fc8",
    "signature": "0x669665a14d82359a78bcba7ad9e481b02798fd953bf8dc7c8229c0e8391fadf11525f54ed5a9ea7491804bc20a051a97db0ccea55289ffe49b571b9d543591a51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}