Examine source code of Contra Dance swinging

{
  "theme": {
    "images": {
      "theme_frame": "Contra_PersonaTop_03.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#fc8888"
    }
  },
  "version": "2.0",
  "name": "Contra Dance swinging",
  "manifest_version": 2,
  "description": "A swing at the Contrasonic contra dance at the Artisphere in Arlington. Props to the Folklore Society of Greater Washington (FSGW) and to the tunes by DJ Improper. Keywords: dancing, swinging, twirl"
}