{
  "name": "changed_metadata",
  "tree": {
    "$className": "DataModel",
    "Workspace": {
      "$className": "Workspace",
      "Baseplate": {
        "$className": "Part",
        "$properties": {
          "Anchored": true
        }
      },
      "Thing": {
        "$path": "a"
      }
    }
  }
}