4.3.1 Client Request

 POST https://sts1.contoso.com/adfs/proxy/relyingpartytrusts/7aeee25c-4beb-e211-9867-00155d6ff01e/fedpassive/publishedsettings?api-version=1 HTTP/1.1
 Content-Type: application/json;charset=UTF-8
 Host: sts1.contoso.com
 Content-Length: 264
 Expect: 100-continue
  
 {"internalUrl":"https://urlInternal","externalUrl":"https://urlExternal","proxyTrustedEndpoint":"https://urlExternal"}