Snippet of prismic.io blog post document mask

blog-post.json

{
"Blog Post" : {
    "body" : {
      "type" : "StructuredText",
      "config" : {
        "placeholder" : "Start writing your blog post here...",
        "minHeight" : "400px",
        "imageConstraint" : {
          "width" : 640.0
        }
      }
    }
  },
  "Metadata" : {
    "shortlede" : {
      "fieldset" : "Short lede (~15 words)",
      "type" : "StructuredText",
      "config" : {
        "single" : "paragraph",
        "placeholder" : "The shortest catcher to your topic"
      }
    },
    "image" : {
      "fieldset" : "Main image",
      "type" : "Image",
      "config" : {
        "constraint" : {
          "width" : 800.0
        },
        "thumbnails" : [ {
          "name" : "Icon",
          "width" : 100.0,
          "height" : 100.0
        }, {
          "name" : "Column",
          "width" : 320.0
        }, {
          "name" : "Wide",
          "width" : 600.0,
          "height" : 300.0
        } ]
      }
    },
    "author" : {
      "fieldset" : "Author",
      "type" : "Link",
      "config" : {
        "select" : "document",
        "masks" : [ "author" ]
      }
    },
...SNIP...