JSON format for a link_to_Item columnr

I created a Monday application for incoming rental leads coming from Zillow. Trulia, MLS, etc

I have two boards…

  1. Properties - includes links for photos, links to videos, etc for a specific property
  2. incoming leads board has a link to the properties board

I created a zap which creates a new item in Monday and sends an email to the prospect however I can’t figure out how to populate the “link_to_item” column in the Properties board so the various links are added to the autoresponder.

Do you know the JSON format for a “link_to_item” column?

thanks,