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Content-Type: application/geo+json; charset=utf-8

{"type": "FeatureCollection",
    "features":[
{
   "type":"Feature",
   "id":"testlayer èé.2",
   "geometry":null,
   "properties":{
      "id":3,
      "name":"three",
      "utf8nameè":"three èé↓"
   }
}]}