Post Webhook External

I'm trying to post a Webhook into a CTMS and it's out of scope for QuickBase to help with. The documentation doesn't provide any info on posting Webhooks externally. 

This is the instructions that our CTMS vendor provided:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"; xmlns:clin="URL"><soapenv:Header/>
<soapenv:Body>
<clin:SubmitSurvey>
<!--Optional:-->
<clin:strSubmission>
<![CDATA[
<submission>
<firstname> </firstname>
<lastname> </lastname>
<gender></gender>
<dob></dob>
<address1></address1>
<address2></address2>
<city> </city>
<state> </state>
<zip></zip>
<phone></phone>
<email></email>
<besttimetocall></besttimetocall>
<howdidyouhearaboutus></howdidyouhearaboutus>
<comments></comments>
</submission>
]]>
</clin:strSubmission>
<clin:strSecret>PASSWORD</clin:strSecret>
</clin:SubmitSurvey>
</soapenv:Body>
</soapenv:Envelope>

The validator on our (CTMS Vendors) end does not like capitals, spaces or special characters.

I plugged their info in like this and many other variations of this, but am failing:


Can QuickBase send XML formatted submissions in a SOAP message externally?