Structure as ExternalURL Parameter

Hey guys, 

Because of the separation between my logic layer and my interface, I need to submit a Structure to an ExternalURL. The ExternalURL is perfectly capable of parsing this structure, yet I can't pass it as a parameter for some reason. The only error I get is "You're trying to create an Input Parameter with a type not supported by External Site."  which is not very helpful. Is there a way to circumvent this? 

Many thanks in advance & kindest regards,
Hi Robrecht,

ExternalURL attributes are very limited. You can't pass a sctructure, but you can try to stringfy it to JSON and pass it like a string.
Hey André,

Unfortunately, the data I want to pass is a Google Places API response, which leads to a HTTP 414 (Request URL too long) when using ardoJSON. Thanks, though :) 

Kindest regards,