I am using SOAPUI 5.2.1 to test production rest service but how to handle ping/SSO Authentication

I have created new rest service to test but instead of getting expected response I am getting 

<form method="post" action="https://pf.idf.medcity.net/idp/SSO.saml2">
<input type="hidden" name="SAMLRequest" value="PHNhbWxwOkF1dGhuUmVxdWVzdCBWZXJzaW9uPSIyLjAiIElEPSJCSUFhV2poMmRRMm5XSWpZMktEUzR1TG5HeUEiIElzc3VlSW5zdGFudD0iMjAxNi0wOS0wMlQwNzowMDoyNS4yNzhaIiB4bWxuczpzYW1scD0idXJuOm9hc2lzOm5hbWVzOnRjOlNBTUw6Mi4wOnByb3RvY29sIj48c2FtbDpJc3N1ZXIgeG1sbnM6c2FtbD0idXJuOm9hc2lzOm5hbWVzOnRjOlNBTUw6Mi4wOmFzc2VydGlvbiI+U2NoZWR1bGluZ0V4cHJlc3M8L3NhbWw6SXNzdWVyPjxzYW1scDpOYW1lSURQb2xpY3kgQWxsb3dDcmVhdGU9InRydWUiLz48L3NhbWxwOkF1dGhuUmVxdWVzdD4="/>
<input type="hidden" name="RelayState" value="nHDSQP8z1hX2Ob4Ai0CRCWHErAMsMD"/>
<noscript>
<input type="submit" value="Resume"/>
</noscript>
</form>

 

SSO ping validate the credential and return open token and then service return response. 

Can you please help me how to handle this in SOAPUI.

 

Thank you