How to post a comment related to an artist

loco_tip_1.html

<h2>{{ artist.name }}</h2>

<div>{{ artist.bio }}</div>

{% with_scope artist: artist._id %}

{% assign comments = contents.comments %}

{% if comments == empty %}

<p>No comments</p>

{% else %}

<ul class="artist">
  {% for comment in comments %}
  <li>
    <p>{{comment.email}}</p>
    <p>{{comment.message}}</p>
    <hr />
  </li>
  {% endfor %}
  
</ul>
{% endif %}

{% endwith_scope %}

<div>Add Comment: </div>
<form action="{{ contents.comments.api.create }}" method="post">
  <input type="hidden" name="success_callback" value="{{ url }}"/>
  <fieldset>
    <ol>
      <li>
        <label for="comment_email">Your Email:</label>
        <input name="content[email]" id="comment_email" /> </li>
      <li>
        <label for="comment_message">Message:</label>
        <textarea name="content[message]" id="comment_message"></textarea> 
      </li>
      <input type=hidden name="content[artist]" value="{{artist._id}}" />
      <button type="submit">Add Comment</button>
    </ol>
  </fieldset>  
</form> 

{% endblock %}