Passing secure parameter to fixlet through Api

4 
       <BES>
       <SourcedFixletAction>
       <SourceFixlet>
       <Sitename>siteName is passed</Sitename>
       <FixletID>FixletID is passed</FixletID>
       <Action>Action1</Action>
       </SourceFixlet>
       <Target>
       <ComputerName>computerName is passed</ComputerName>
       </Target>
        <SecureParameter Name="value">Value to be passed</SecureParameter>
      </SourcedFixletAction>
       </BES>

This is the xml body to post.