curl --request POST \
  --url https://mcp-bff.gojinko.com/api/v1/shop/sync/ancillaries \
  --header 'Content-Type: application/json' \
  --data '
{
  "trip_id": "<string>",
  "selections": [
    {
      "offer_id": "<string>",
      "pax_ref_id": "<string>",
      "quantity": 123
    }
  ]
}
'

{
  "quoted_item_id": 123,
  "selected_ancillaries": [
    {
      "offer_id": "<string>",
      "pax_ref_id": "<string>",
      "quantity": 123
    }
  ],
  "total_with_ancillaries": {
    "amount": 123,
    "currency": "<string>",
    "decimal_places": 123
  },
  "trip_id": "<string>"
}