GeoJson saved from geojson-editor

data.geojson

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              8.352871,
              -4.581901
            ],
            [
              55.880334,
              -4.581901
            ],
            [
              55.880334,
              35.972449
            ],
            [
              8.352871,
              35.972449
            ],
            [
              8.352871,
              -4.581901
            ]
          ]
        ]
      }
    }
  ]
}