How to add WordPress site Schema without Plugin

How to implement in your website, Add schema markup and rich snippets in WordPress without plugin step by step guide with example.

Footer added more details schema.org

<script type='application/ld+json'> 
{
  "@context": "http://www.schema.org",
  "@type": "Property Business",
  "name": "site name",
  "url": "site url",
  "telephone": "+9737058839",
  "priceRange": "$$-$$$",
  "sameAs": [
    "https://www.facebook.com/username",
    "https://twitter.com/username",
	"https://www.instagram.com/username",
	"https://www.linkedin.com/company/username"
   ],
  "logo": "site-logo",
  "image": "",
  "description": "site-description",
  "address": {
    "@type": "PostalAddress",
    "streetAddress": "",
    "addressLocality": "",
    "addressRegion": "",
    "postalCode": "post code",
    "addressCountry": "country name"
  },
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": "00.000000",
    "longitude": "-000.000000"
  },
  "hasMap": "google map address link",
   "contactPoint": {
    "@type": "ContactPoint",
    "telephone": "+9737058839",
    "contactType": "Reservations"
  }
}
 </script>