curl --request GET \
  --url https://{host}/remuneration/api/fixed-natures \
  --header 'Authorization: <authorization>'

{
  "items": [
    {
      "id": 123,
      "name": "Basic salary",
      "category": {
        "id": 123,
        "code": "BASIC_SALARY"
      },
      "establishments": [
        {
          "id": 123,
          "name": "Lucca FR",
          "currencyCode": "EUR",
          "currencySymbol": "€"
        }
      ]
    }
  ],
  "next": "<string>",
  "prev": "<string>",
  "count": 123
}