curl --request POST \
  --url https://api.lektra.es/documents \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-KEY: <api-key>' \
  --form file='@example-file'

{
  "documentId": "doc_esp456",
  "documentType": "Póliza de Seguro",
  "insuranceCompany": "Seguros Iberia S.A.",
  "policyNumber": "ESP-POL-2024-00123",
  "holder": {
    "fullName": "Lucía Martínez García",
    "nationalId": "12345678Z"
  },
  "validityPeriod": {
    "start": "2024-06-01T00:00:00.000Z",
    "end": "2025-05-31T00:00:00.000Z"
  },
  "insuranceType": "Seguro de Vida",
  "coverage": [
    {
      "type": "Fallecimiento",
      "insuredAmount": 120000,
      "currency": "EUR"
    },
    {
      "type": "Incapacidad Permanente Absoluta",
      "insuredAmount": 80000,
      "currency": "EUR"
    }
  ],
  "annualPremium": {
    "amount": 350,
    "currency": "EUR"
  }
}