Generating a template payload from a given XML payload

I have a XML file

<wsu:Timestamp wsu:Id="TS-2">
      <wsu:Created>{{UTCTIME}}</wsu:Created>
   </wsu:Timestamp>
      <wsse:UsernameToken>
        <wsse:Username>{{USERNAME}}</wsse:Username>
        <wsse:Password Type="http://ift.tt/1aTA7XU">{{PASSWORD}}</wsse:Password>
       </wsse:UsernameToken>
   </wsse:Security>
   </soap:Header>
    <soap:Body>
           <ns2:filter>
              <ns2:conjunction>And</ns2:conjunction>
               <ns2:group>
                        <ns2:conjunction>And</ns2:conjunction>
                        <ns2:upperCaseCompare></ns2:upperCaseCompare>
                        <ns2:item>
                            <ns2:conjunction>And</ns2:conjunction>
                            <ns2:upperCaseCompare></ns2:upperCaseCompare>
                            <ns2:attribute>PartyName</ns2:attribute>
                            <ns2:operator>=</ns2:operator>
                            <ns2:value>{{PARTYNAME}}</ns2:value>
                        </ns2:item>
                    </ns2:group>
                </ns2:filter>"+              
                <ns2:excludeAttribute></ns2:excludeAttribute>
            </ns1:findCriteria>
            <ns2:retrieveAllTranslations></ns2:retrieveAllTranslations>
            </ns1:findControl>
        </ns1:findOrganization>
    </soap:Body>
</soap:Envelope>

I want to generate a generalised template from the given file that I can populate with different values as

<wsu:Timestamp wsu:Id="TS-2">
      <wsu:Created>{{UTCTIME}}</wsu:Created>
         </wsu:Timestamp>
      <wsse:UsernameToken>
        <wsse:Username>{{USERNAME}}</wsse:Username>
        <wsse:Password Type="http://ift.tt/1aTA7XU">{{PASSWORD}}</wsse:Password>
       </wsse:UsernameToken>
   </wsse:Security>
   </soap:Header>
    <soap:Body>
                <ns2:fetchStart>{{fetchStart}}</ns2:fetchStart>
                <ns2:fetchSize>{{fetchSize}}</ns2:fetchSize>
                <ns2:filter>
                    <ns2:conjunction>{{conjunction}}</ns2:conjunction>
                    <ns2:group>
                        <ns2:conjunction>{{conjunction}}</ns2:conjunction>
                        <ns2:upperCaseCompare>{{upperCaseCompare}}</ns2:upperCaseCompare>
                        <ns2:item>
                            <ns2:conjunction>And</ns2:conjunction>
                            <ns2:upperCaseCompare></ns2:upperCaseCompare>
                            <ns2:attribute>{{attribute}}</ns2:attribute>
                            <ns2:operator>{{operator}}</ns2:operator>
                            <ns2:value>{{value}}</ns2:value>
                        </ns2:item>
                    </ns2:group>
                </ns2:filter>           
                <ns2:excludeAttribute>{{excludeAttribute}}</ns2:excludeAttribute>
            </ns1:findCriteria>
           <ns2:retrieveAllTranslations>{{retrieveAllTranslations}}</ns2:retrieveAllTranslations>
            </ns1:findControl>
        </ns1:findOrganization>
    </soap:Body>
</soap:Envelope>

Please suggest optimal solutions to generate this output template that derives its values from tags.