Mailchimp API v3 add merge field with checkboxes
<p>I need to add checkboxes <code>merge-field</code> with choices to a list.</p>

<p>API key is valid, other requests work and I'm doing such request:</p>

<pre><code>POST https://us12.api.mailchimp.com/3.0/lists/424242/merge-fields

Body: {"name": "provider_accounts", "type": "checkboxes", "options": { "choices": ["BMW", "Audi", "Toyota"]}, "tag": "provider_accounts"}
</code></pre>

<p>And I got an error for some reason!</p>

<pre><code>{
  "type": "http://developer.mailchimp.com/documentation/mailchimp/guides/error-glossary/",
  "title": "Invalid Resource",
  "status": 400,
  "detail": "The resource submitted could not be validated. For field-specific details, see the 'errors' array.",
  "instance": "",
  "errors": [
    {},
    {}
  ]
}
</code></pre>

<p>BTW if I change the type to <code>radio</code> request works and new <code>merge-field</code> is created.</p>