How to extract specific fields in BATCH using Mailchimp API v3 for GET method?
<p>I am trying to GET information(specific fields from email-activity), how should I do it in Batch GET requests in Mailchimp api v3?
This is my code -</p>

<pre><code>{
"operations": [
  {
    "method": "GET", 
    "path": "/reports/campaign_id/email-activity",
   "operation_id" : "123"
  }
]
}
</code></pre>

<p>With the above code, the entire email-activity is extracted, I only need few fields from email-activity like "email_address" and "campaign_id". How do I do it using BATCH GET request using Mailchimp API v3?</p>