curl --request GET \
  --url https://{host}/remuneration/api/fixed-items

{
  "items": [
    {
      "id": 123,
      "amount": 123,
      "startsOn": "2023-12-25",
      "endsOn": "2023-12-25",
      "comment": "First-half salary increase",
      "natureId": 123,
      "nature": {
        "id": 123,
        "name": "Basic salary",
        "category": {
          "id": 123,
          "code": "BASIC_SALARY"
        },
        "establishments": [
          {
            "id": 123,
            "name": "Lucca FR",
            "currencyCode": "EUR",
            "currencySymbol": "€"
          }
        ]
      },
      "workContractId": 123,
      "workContract": {
        "workContractId": 123,
        "amendmentId": 123,
        "ownerId": 123,
        "owner": {
          "id": 123,
          "firstName": "<string>",
          "lastName": "<string>",
          "name": "<string>",
          "displayName": "<string>"
        },
        "startsOn": "2023-12-25",
        "endsOn": "2023-12-25"
      }
    }
  ],
  "next": "<string>",
  "prev": "<string>",
  "count": 123
}