```html
<button data-toggle="nc-widget"
  data-attributes-email-value="john.snow@example.com"
  data-attributes-first-name-value="John"
  data-attributes-first-name-presentation="readonly"
  data-attributes-last-name-value="Snow"
  data-attributes-last-name-presentation="readonly">
  Launch NC widget!
</button>
```