Edit in JSFiddle

<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "Article",
  "headline": "Nombre del titular",
  "image": "/image.jpg",
"keywords": ["keyword 1","keyword 2","keyword 3","keyword 3","keyword 4","keyword 5"],
  "datePublished": "2015-09-20T13:39:38Z",
  "articleSection": "Categoría del artículo",
  "creator": "Nombre",
  "author": "Nombre",
  "articleBody": "Cuerpo del artículo",
  "mainEntityOfPage": "True"
}
</script>