title: Invalid JSON in tag schema
body: <p>Hey guys I am really new to shopify. and trying to learn liquid. I am getting an invalid JSON tag in schema/ and I am not quite sure where it is. I am just trying to have 4 basic blocks that you can add to a section with a image and a title underneath. I don't have the content block made right now because I can't get the image one to work in the first place.</p>
  
  <pre><code>{% for block in section.blocks %}
    &lt;div class="grid-item" {{ block.shopify_attributes }}&gt;
    {% case block.type %}
    {% when 'image' %}
      &lt;img src="{{ block.settings.image | img_url }}"&gt;
  
  &lt;/div&gt;
    {% when 'text' %}
      {{ block.settings.content }}
    {% endcase %}
  {% endfor %}
  
  {% schema %}
    {
      {
      "blocks": [
        {
         "name": "Service",
         "limit": 4
         "settings": [
            {
            "type": "image_picker",
            "id": "image",
            "label": "image"
            }
          ]
        }
      ]
    }
    }
  {% endschema %}
  </code></pre>
  
  <p>Once again, Like I said, I am really new to all of this so any point in the right direction or help would be crazy awesome! Thanks!</p>