curl --request PUT \
  --url https://{tenant}.stamp.eu/rest/employees/{employee}/illnesses \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "<string>",
  "start_date": "2023-12-25",
  "end_date": "2023-12-25",
  "reason": "<string>"
}
'

{
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "employee_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "type": "<string>",
    "start_date": "2023-12-25",
    "end_date": "2023-12-25",
    "absence_type": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "slug": "<string>",
      "name": "<string>",
      "category": "<string>",
      "color": "<string>",
      "icon": "<string>",
      "is_system": true,
      "half_day_allowed": true,
      "affects_vacation": true,
      "target_work_factor": 0.5,
      "working_time_flag": 123,
      "requires_approval": true,
      "is_paid": true,
      "certificate_required": true,
      "certificate_deadline_days": 123,
      "substitute_option": "<string>",
      "count_weekdays_only": true,
      "is_active": true,
      "sort_order": 123
    },
    "business_days": 123,
    "calculated_days": 123,
    "reason": "<string>",
    "decided_by": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "decided_at": "2023-11-07T05:31:56Z",
    "decision_note": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}