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

{
  "items": [
    {
      "id": 1,
      "name": "<string>",
      "description": "<string>",
      "fullTimeEquivalent": 0.5,
      "publicHolidaysCalendar": {
        "id": 1,
        "name": "<string>"
      },
      "isPartTime": true,
      "isArchived": true,
      "isScheduleValid": true,
      "authorizedCommands": [],
      "referencePeriod": {},
      "contractWorkingTimeDuration": {
        "value": 1,
        "iso": "<string>"
      },
      "referenceWorkingTimeDuration": {
        "value": 1,
        "iso": "<string>"
      },
      "fullDayAbsence": {
        "duration": {
          "value": 1,
          "iso": "<string>"
        },
        "absenceAccountIds": [
          1
        ],
        "absenceCategoryIds": [
          1
        ]
      },
      "currentAssignmentsCount": 123,
      "timesheetRegulation": {
        "id": 1,
        "name": "<string>"
      },
      "currentSchedulePatternSummary": {
        "days": [
          {
            "workDuration": 1
          }
        ]
      }
    }
  ]
}