Examine source code of My Cad drawing

{
  "theme": {
    "images": {
      "theme_frame": "Caddrawingheader.jpg"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#faf5f5"
    }
  },
  "version": "2.0",
  "name": "My Cad drawing",
  "manifest_version": 2,
  "description": "Drawings of an hand crossbow."
}