Dimming of the background in dark themes, as a percentage; 0-100.
Document with the wallpaper.
Optionalis_True, if the wallpaper is downscaled to fit in a 450x450 square and then box-blurred with radius 12 pixels.
Optionalis_True, if the background moves slightly when the device is tilted.
Type of the background, always "wallpaper".
The background is a wallpaper in the JPEG format.
See
Telegram Bot API: BackgroundTypeWallpaper