title: graphene graphql dictionary as a type
body: <p>I'm a newbie for the graphene and I'm trying to map the following structure into a Object Type and having no success at all</p>
  
  <pre><code>    {
    "details": {
      "12345": {
        "txt1": "9",
        "txt2": "0"
      },
      "76788": {
        "txt1": "6",
        "txt2": "7"
      }
    }
  }
  </code></pre>
  
  <p>Any guidance is highly appreciated<br>
  Thanks</p>