{
  "type": "CityJSON",
  "version": "1.1",
  "extensions": {
    "Noise": {
      "url" : "https://someurl.org/potato.ext.json",
      "version": "1.0"
    }
  },
  "CityObjects": {
    "un": {
      "type": "+Potato", 
      "geometry": [],
      "attributes": { 
        "storeysAboveGround": 2      
      }
    }
  },
  "vertices": [],
  "transform": {
    "scale": [0.0, 0.0, 0.0],
    "translate": [1.0, 1.0, 1.0]
  }
}