curl --request POST \
  --url https://api.fint.app/api/v1/event/checkout/ticket \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "pageId": 1,
  "items": [
    {
      "itemId": 10,
      "quantity": 2
    }
  ],
  "buyer": {
    "name": "Juan",
    "lastName": "Pérez",
    "documentType": "DNI",
    "documentNumber": "12345678",
    "email": "juan.perez@example.com",
    "phoneNumber": "+5491123456789",
    "address": "Calle Falsa 123",
    "country": "Argentina"
  },
  "tickets": [
    {
      "firstName": "Juan",
      "lastName": "Pérez",
      "document": "12345678",
      "email": "juan.perez@example.com",
      "itemId": 10,
      "customFieldResponses": [
        {
          "customFieldId": 1,
          "value": "Vegetariano"
        }
      ]
    },
    {
      "firstName": "María",
      "lastName": "González",
      "document": "87654321",
      "email": "maria.gonzalez@example.com",
      "itemId": 10,
      "customFieldResponses": [
        {
          "customFieldId": 1,
          "value": "Sin restricciones"
        }
      ]
    }
  ],
  "totalAmount": 5000,
  "paymentMethod": "CASH",
  "adminNotes": "Tickets creados manualmente por el administrador"
}'

{
  "success": true,
  "purchase": {
    "id": 123,
    "reference": "<string>"
  }
}