JSON LD for Statamic Nav

<script type="application/ld+json">
  {
    "@context": "http://schema.org/", 
    "@type": "BreadcrumbList", 
    "itemListElement": [
      {{ nav:breadcrumbs }}
      { 
        "@type": "ListItem", 
        "position": "{{ index }}", 
        "item": { 
          "@id": "{{ permalink }}", 
          "name": "{{ title }}" 
        } 
      }{{ if not last }},{{ /if }}
      {{ /nav:breadcrumbs }}
    ]
  }
</script>