Edit in JSFiddle

<script type='application/ld+json'>
{
"@context": "http://schema.org/",
"@type": "Dentist",
"name":"Nombre de la compañía",
"priceRange":"€",
"openingHours": "Mo,Tu,We,Th,Fr 09:00-21:00",
"address": {
"@type": "PostalAddress",
"addressCountry": "España",
"addressLocality": "Localidad",
"addressRegion": "Region",
"postalCode": "18005",
"streetAddress": "Calle",
"mainEntityOfPage": "https://www.dominio.com/",
"name": "Nombre de la compañía"
},
"telephone": "999 999 999",
"description": "Descripción aquí.",
"image": {
"@type": "ImageObject",
"description": "Descripción de la imagen",
"url": "https://dominio.com/imagen.jpg",
"name": "Nombre de la imagen"
},
"geo": {
"@type": "GeoCoordinates",
"latitude": "33.33333",
"longitude": "-3.633333"
}
}
</script>