Examine source code of Polka - Eternal Sonata

{
  "theme": {
    "images": {
      "theme_frame": "EternalSonataPolka.jpg"
    },
    "colors": {
      "frame": "#adadad",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Polka - Eternal Sonata",
  "manifest_version": 2,
  "description": "Character: Polka [Eternal Sonata]\nBackground: [Kingdom Hearts]"
}