Get the Network Hierarchy

{
  "hierarchy": {
    "scope": "main",
    "roots": [
      {
        "region": {
          "groupingId": "12345",
          "groupingType": "road",
          "name": "ABC",
          "sortOrder": 0,
          "attributes": {},
          "legacyGroupingId": "123"
        },
        "children": [
          {
            "region": {
              "groupingId": "456",
              "groupingType": "area",
              "name": "Area 1",
              "sortOrder": 10,
              "attributes": {},
              "legacyGroupingId": "456"
            },
            "children": [
              {
                "region": {
                  "groupingId": "789",
                  "groupingType": "station",
                  "name": "Station 1",
                  "sortOrder": 10,
                  "attributes": {},
                  "legacyGroupingId": "789"
                },
                "children": [
                  {
                    "region": {
                      "groupingId": "1234",
                      "groupingType": "track",
                      "name": "Track 1",
                      "sortOrder": 0,
                      "attributes": {
                        "is_virtual": "Yes"
                      },
                      "legacyGroupingId": "123"
                    },
                    "children": []
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  }
}