{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "Sphere 15mm",
      "op": { "type": "Sphere", "radius": 15, "segments": 32 }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [{ "root": 1, "material": "default" }]
}