IsochroneResponse

{
    "polygons": [
        {
            "properties": {
                "bucket": 0
            },
            "type": "Feature",
            "geometry": {
                "type": "Polygon",
                "coordinates": [
                    [
                        13.351851,
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                    ],
                    [
                        13.350402,
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                    ],
                    [
                        13.352598,
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                    ],
                    [
                        13.351851,
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                    ]
                ]
            }
        }
    ]
}