curl --request PATCH \
  --url https://api.example.com/payment-sheet/parameter/{paymentSheetParameterId}/fields \
  --header 'Content-Type: application/json' \
  --data '
{
  "fields": [
    {
      "eventId": "123-abc",
      "systemEvent": "OT_STANDARD_50_PERCENT",
      "advancedPercentage": 0.5
    }
  ]
}
'

{
  "status": true,
  "mensagem": "OK"
}