How to change the url of a Chrome app shortcut?

I have 2 Google accounts (personal/work). If I go to the Google Calendar site, on the work account, in Chrome, I can go to ... / More tools / Create shortcut..., which will create a Google Calendar.app file. I can then add it to the dock - but, this goes to the wrong account :( If I do Show Package Contents I can open the Info.plist file, and I see the url inside:

CrAppModeShortcutURL
	https://calendar.google.com/calendar/r 

Now if I change the url to https://calendar.google.com/calendar/b/1/r (which is the correct way to choose a specific Google account), I would expect it to work. But in fact that doesn't change anything. But actually, even if I put any random website here, it will still go to Google Calendar so basically I think this has no effect at all, which is surprising. Ideas?