curl --request GET \
  --url https://{host}/schedule/api/working-time-arrangements \
  --header 'Authorization: <authorization>'

{
  "items": [
    {
      "id": 1,
      "name": "<string>",
      "description": "<string>",
      "unit": "day",
      "referencePeriod": {
        "frequencyType": "week",
        "firstDayOfWeek": "monday"
      },
      "contractWorkingTimeDuration": {
        "value": 1,
        "iso": "<string>",
        "unit": "days"
      },
      "referenceWorkingTimeDuration": {
        "value": 1,
        "iso": "<string>",
        "unit": "days"
      },
      "fullTimeEquivalent": 0.5,
      "fullDayAbsenceDurationInHours": 1,
      "publicHolidaysCalendar": {
        "id": 1,
        "name": "<string>"
      },
      "isPartTime": true,
      "isArchived": true,
      "isScheduleValid": true,
      "currentAssignmentsCount": 123,
      "timesheetRegulation": {
        "id": 1,
        "name": "<string>"
      },
      "currentSchedulePatternSummary": {
        "shape": "singleWeek",
        "days": [
          {
            "dayOffType": "off",
            "workPosition": "firstHalf",
            "workDuration": 1
          }
        ]
      },
      "authorizedCommands": [
        "create"
      ]
    }
  ]
}