{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "html": {
      "type": "string"
    },
    "text": {
      "type": "string"
    },
    "sample": {
      "type": "boolean",
      "const": true,
      "description": "True: the rendered preview uses example content, never customer events."
    }
  },
  "required": [
    "html",
    "text",
    "sample"
  ],
  "additionalProperties": {}
}