Edit in JSFiddle

<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [{
    "@type": "ListItem",
    "position": 1,
    "item": {
      "@id": "https://ejemplo.com/categoria1",
      "name": "Categoría 1",
      "image": "http://ejemplo.com/imagenes/foto-categoria1.png"
    }
  },{
    "@type": "ListItem",
    "position": 2,
    "item": {
      "@id": "https://ejemplo.com/categoria1/Autores",
      "name": "Autores",
      "image": "http://ejemplo.com/imagenes/icono-autores.png"
    }
  },{
    "@type": "ListItem",
    "position": 3,
    "item": {
      "@id": "https://ejemplo.com/categoria1/Autores/vargas-llosa",
      "name": "Ann Leckie",
      "image": "http://ejemplo.com/imagenes/autor-vargas-llosa.png"
    }
  }]
}
</script>