how i can adding Structured data JSON-LD to multisite in drupal 7

how i can add rich snippets(Structured data JSON-LD) to multisite in drupal7 ??

example JSON-LD:

<script type="application/ld+json">    {"@context": "https://schema.org",        "@type": "Organization",        "url": "http://www.example.com",      "name": "Unlimited Ball Bearings Corp.",       "contactPoint": {     "@type": "ContactPoint",     "telephone": "+1-401-555-1212",     "contactType": "Customer service"   } }   </script>