title: How do you map a field as a generic object in elasticsearch? (doesn't need to be indexed)
body: <p>Let's say I have this this data:</p>
  
  <pre><code>{
    "field1": {
      "foo":"bar"
    }
  }
  </code></pre>
  
  <p>I would like to map "field1" as an Any object, if possible. I don't need to index it, if that makes it easier. I don't know what the structure of field1 is and can change. So I should be able to update my type to something like:</p>
  
  <pre><code>{
      "field1": {
          "foo": 123
      }
  }
  </code></pre>
  
  <p>Is this possible? Right now it seems I have to know the mappings of the fields in the "field1" object and cannot deviate from it (except add new fields inside). </p>