title: Store key-value pair in JSON array of Objects
body: <p>I am interested in storing key-value pair of metadata inside a JSON array containing multiple JSON objects. This will instruct a generic parser what to do with the list of JSON objects in the JSON Array when it is processing the JSON Array. Below is a sample JSON, with where I am hoping to have some sort of metadata field.   </p>
  
  <pre><code>{
    "Data": [
      &lt;&lt; "metadata":"instructions" here &gt;&gt;
      {
        "foo": 1,
        "bar": "barString"
      },
      {
        "foo": 3,
        "bar": "fooString"
      }
    ]
  }
  </code></pre>
  
  <p>What is the proper way to structure this mixed data JSON array?</p>