title: Parse raw string as object using JMESPath
body: <p>I have an object that I am parsing using JMESPath where the value of a property is a JSON object encoded as a string.  I want to be able to parse that string property as a JSON Object and work with it using JMESPath only (I'm aware I could parse the value using a JSON encoder).</p>
  <p>Here is the object:</p>
  <pre class="lang-json prettyprint-override"><code>{
      &quot;ARN&quot;: &quot;arn:aws:secretsmanager:us-east-1:xxxxx:secret:todobackend/db/credentials-AP57Kn&quot;,
      &quot;Name&quot;: &quot;todobackend/db/credentials&quot;,
      &quot;VersionId&quot;: &quot;c95fae54-e7b4-4c7f-80d6-2c5649f86570&quot;,
      &quot;SecretString&quot;: &quot;{\&quot;MYSQL_USER\&quot;:\&quot;todobackend\&quot;,\&quot;MYSQL_PASSWORD\&quot;:\&quot;password\&quot;}&quot;,
      &quot;VersionStages&quot;: [
          &quot;AWSCURRENT&quot;
      ],
      &quot;CreatedDate&quot;: 1523276277.046
  }
  </code></pre>
  <p>So I want to parse the <code>SecretString</code> property as a JSON object.</p>
  <p>Any ideas on whether or not this is possible?</p>