Get Raw response from Http Request of Graph Call

Hi,

I'm Calling a method from Postman https://graph.microsoft.com/v1.0/subscriptions For the URL( in the method subscription) I added a Flow HTTP request received url. The problem I'm having is that on the first CALL to this method it is expecting to get a response with a validationToken it sent in the query. I have had no success retrieving this data even though it is in the RAW Data. See queries in image

I need to get "validationtoken" in the queries section. The I need to send a response with the exact same data to trigger the subscription. I have not been able to do this. If I parse the Body of the HTTP trigger I don't see "queries" only the headers section.

I can access this data of the header but not the query...any ideas what I'm doing wrong