Can't call an integration with a file on its body

Question

I am trying to call an integration that needs to pass a file from appian through its body.

However, it's not being acceptable, cause 
 
 As you can see, the connection endpoint is expecting the file parameter to be of type File. 
 An information: with the url that I am retrieving in appian, I am being able to download the file just by clicking on the link. 
 However apparently the File type on this connection expects another type of string: MultipartFile, 
 Is it by any chance possible that conversion? Thanks

Stefan Helzle · Accepted Answer

You define a JSON structure that contains the URL to the file as the content. So, you are sending that URL to the other system. 
 https://docs.appian.com/suite/help/24.2/Integration_Object.html#sending-a-binary-document

Silas. B. Ferreira · Answer

It worked as expected. 
 Special thanks goes to Mr. Stefan Helzle and Mr. yogeshc0701 . Thank you all.