json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "Simple Email Template Schema",
      "description": "Defines the customization points available in a Simple Email Template.",
      "type": "object",
      "additionalProperties": false,
      "required": [
          "meta",
          "content"
      ],
      "properties": {
          "meta": {
              "type": "object",
              "title": "Email",
              "required": [
                  "fromName",
                  "fromAddress",
                  "subject"
              ],
              "additionalProperties": false,
              "properties": {
                  "fromName": {
                      "type": "string",
                      "title": "From Name",
                      "default": "My Company",
                      "propertyOrder": 1,
                      "minLength": 1,
                      "options": {
                          "validate": [
                              "handlebars"
                          ]
                      }
                  },
                  "fromAddress": {
                      "type": "string",
                      "title": "From Address",
                      "default": "company@example.com",
                      "propertyOrder": 2,
                      "minLength": 5,
                      "options": {
                          "validate": [
                              "handlebars"
                          ]
                      }
                  },
                  "subject": {
                      "type": "string",
                      "title": "Subject",
                      "propertyOrder": 3,
                      "minLength": 1,
                      "options": {
                          "validate": [
                              "handlebars"
                          ],
                          "input_height": "50px"
                      }
                  }
              }
          },
          "content": {
              "type": "object",
              "title": "Content",
              "required": [
                  "bodyContent"
              ],
              "additionalProperties": false,
              "properties": {
                  "headerImage": {
                      "title": "Header Image",
                      "type": "string"
                  },
                  "headerContent": {
                      "title": "Header",
                      "type": "string",
                      "options": {
                          "validate": [
                              "handlebars"
                          ],
                          "input_height": "50px"
                      }
                  },
                  "bodyContent": {
                      "title": "Body",
                      "type": "string",
                      "description": "Supports markdown and handlebars expressions. e.g. *bold* _underline_ and [link](https://example.com)",
                      "options": {
                          "validate": [
                              "handlebars"
                          ]
                      }
                  },
                  "cta": {
                      "type": "object",
                      "title": "Call to Action",
                      "properties": {
                          "enabled": {
                              "title": "Display CTA button?",
                              "type": "boolean",
                              "default": false
                          },
                          "text": {
                              "title": "Text",
                              "type": "string"
                          },
                          "link": {
                              "title": "Link",
                              "type": "string"
                          }
                      }
                  },
                  "footerContent": {
                      "title": "Footer",
                      "type": "string",
                      "options": {
                          "validate": [
                              "handlebars"
                          ],
                          "input_height": "50px"
                      }
                  }
              }
          }
      }
  }