If you are using the browser extension to add the monitors, you can use the option to “monitor full page” and then update the config in options window.
Alternatively, following is the exported JSON that you can import as JSON in your Watchlist:
{"client":{"web":1},"data":[{"name":"Pennsylvania Land for Sale & Real Estate | realtor.com®","uri":"https://www.realtor.com/realestateandhomes-search/Pennsylvania/type-land/price-na-90000/lot-sqft-217800/pnd-hide/55p-hide/sby-6","content_type":2,"config":"{\"selections\":[{\"frames\":[{\"index\":0,\"excludes\":[],\"includes\":[{\"expr\":\"[data-testid='property-detail']\",\"type\":\"css\"}]}],\"dynamic\":true,\"delay\":5}],\"regexp\":null,\"ignoreEmptyText\":true,\"includeStyle\":false,\"viewport\":{\"width\":1843,\"height\":979},\"dataAttr\":\"text\"}","schedule":"{\"type\":\"INTERVAL\",\"params\":{\"interval\":10829}}","state":40,"tags":[],"ts":"2022-06-08T11:19:55.919Z","datasource_id":null}]}
Let me know if you face any issue. Cheers!