GeoJson saved from geojson-editor

data.geojson

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              40.262146,
              70.121228
            ],
            [
              3.740845,
              46.840468
            ],
            [
              66.29837,
              35.779943
            ],
            [
              40.262146,
              70.121228
            ]
          ]
        ]
      }
    }
  ]
}