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

{
  "id": 123,
  "name": "Basic salary",
  "category": {
    "id": 123,
    "code": "BASIC_SALARY"
  },
  "establishments": [
    {
      "id": 123,
      "name": "Lucca FR",
      "currencyCode": "EUR",
      "currencySymbol": "€"
    }
  ]
}