curl --request GET \
  --url https://{tenant}.stamp.eu/rest/datev/lohnart-mappings \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "time_category": "<string>",
      "lohnart_nummer": "<string>",
      "label": "<string>"
    }
  ]
}