Showtime

I was wondering if it is possible to add a custom icon to bookmarks?

I've looked at the bookmark file and see this:

{
"nodes": {
"": {
"model": {
"type": "bookmark",
"title": "MY Title",
"url": "http://MYIP:9000/disk/video/O3$51$3026515552.mkv",
"svctype": "video"
}
}
}
}

I notice for plugins to show icons the part is something like 'icon' 'logo.png' etc.

What could be used instead of "svctype": "video"?

Thanks.