In the event that you cannot do as my colleague suggests, then you can get more sneaky - although it is more work.
If you take a copy of your vsi then all the recorded requests are present there - open it in Workstation and you can see all the data you need in the recorded_raw_request in the request Attributes tab and the associated information under the Meta Data tab.
Since you have the request, and data describing how it was sent, you can build a test if you so wish. The response body and the associated meta data are also available to you here
Always work with a copy of your vsi - you don't want to break what you have.
Should you no longer have the vsi for the service then all is not lost - download the mar from the portal and unzip it - each mar file is a miniature DevTest project that can be opened in Workstation