An HTTP GET request can have a header field to convey more information to the target server than what's in the URI. I couldn't paste the actual example in the question because I don't have enough Karma points to put in anything that looks like a link. A common header field is Content-Type. It might look like this:
Content-Type: application/json
Others are listed in Wikipedia under "List of HTTP header fields". How would we had a header field to a Splunk "Workflow Action" for an HTTP GET uri?
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