title: Unmarshalling nested json with multiple type
body: <pre><code>[
    1618511472,
    &quot;on-req&quot;,
    null,
    null,
    [
      [
        62577595747,
      ]
    ],
  ]
  </code></pre>
  <p>Above is the json response that needs to be parsed
  I'm currently using <code>var resp []interface{}</code> and <code>json.Unmarshal</code> for the raw response. It works for other fields except the array field</p>
  <p>When I try to cast the array field <code>resp[4].([][]interface{})</code> it doesn't work</p>
  <p>Not sure what is the best approach here. Appreciate any help. Thanks beforehand</p>