The imported image payload.
Base-64 data URL of the image.
Optionalheight?: numberOriginal image height in pixels, when known.
MIME type of the original image (e.g. 'image/png').
Optionalwidth?: numberOriginal image width in pixels, when known.
Discriminator – always 'image'.
An image-based signature. The image cannot be replayed as strokes and SVG export is not supported for this kind.