{
  "$schema": "https://json-structure.org/meta/extended/v0/#",
  "$id": "https://api-evangelist.github.io/basecamp/json-structure/messageupdaterequest-structure.json",
  "title": "MessageUpdateRequest",
  "type": "record",
  "members": [
    {
      "name": "subject",
      "type": "string",
      "description": "Updated message subject"
    },
    {
      "name": "content",
      "type": "string",
      "description": "Updated message body in HTML format"
    },
    {
      "name": "category_id",
      "type": "integer",
      "description": "Updated message category ID"
    }
  ]
}