curl --request POST \
  --url https://api.example.com/Proposta/Calcular \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --header 'IdempotencyKey: <idempotencykey>' \
  --data '{}'

{
  "msg": "<string>",
  "hasError": true,
  "messages": [
    {
      "code": "<string>",
      "context": "<string>",
      "description": "<string>",
      "field": "<string>"
    }
  ]
}