title: Is it possible to use nested merge tags in Mandrill?
body: <p>Is it possible to use <strong>nested merge tags</strong>? </p>
  
  <p>What we need is to be able to define the <code>UNSUB</code> tag depending on the values from other merge tags, like on this example:</p>
  
  <pre><code>&lt;a 
  href="*|UNSUB:*|COMMUNITYURL|*/site/unsuscribe/user_id/*|USERID|*/hash/*|HASH|*/type/all|*"&gt;
  Unsubscribe
  &lt;/a&gt;
  </code></pre>
  
  <p>Is this correct? 
  Should be done in a different way?</p>