redirect a URL on our domain to another domain but trigger Analytics tracking

Hi, our app is hosted on a separate domain from our marketing site. The marketing site has links to signup and signin pages on the app site. Currently we have those nav items going directly to the outside URL. However, we’d like to track these clicks with Google Analytics but with the marketing site domain so we can trace conversions etc.

Is there an good way to do this, perhaps with a shell page that redirects? TIA for any help or suggestions!