A GeoJSON Polygon with a hole

polygon-with-a-hole.geojson

{
  "type": "Feature",
  "properties": {},
  "geometry": {
    "type": "Polygon",
    "coordinates": [
      [
        [
          -120,
          60
        ],
        [
          120,
          60
        ],
        [
          120,
          -60
        ],
        [
          -120,
          -60
        ],
        [
          -120,
          60
        ]
      ],
      [
        [
          -60,
          30
        ],
        [
          60,
          30
        ],
        [
          60,
          -30
        ],
        [
          -60,
          -30
        ],
        [
          -60,
          30
        ]
      ]
    ]
  }
}