JSON integer property being transferred as a float

I am having some issues transferring a property from a JSON response payload to a subsequent REST call. I have two REST calls and between them a property transfer of an integer value in the payload to a URL parameter. While the value in the JSON is {"id":14}, it is being mapped into the target URL as /14.0/ - which my REST service rejects.

I understand that numbers are intrinsically floating point in JS(ON), but was wondering if there was any way I could apply a cast or truncation as part of the property transfer?

I am on SoapUI OS 5.2.1 on Windows 10.