{
    "sheets": ["city"],
    "ranges": [
        {"row": 0, "column": 0, "sheet": "city", "row-header": true,
         "fields": [
                {"path": "$[][0]", "label": "RID"},
                {"path": "$[][1]", "label": "Country"},
                {"path": "$[][2]", "label": "City"},
            ],
         "row-groups": [
             {"path": "$"},
            ]
        }
    ]
}