json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "type": "object",
      "additionalProperties": false,
      "properties": {
          "title": {
              "type": "string"
          },
          "content": {
              "type": "string"
          },
          "status": {
              "type": "integer"
          },
          "publication_date": {
              "description": "string timestamp representing the start date of the booking",
              "type": "string"
          },
          "expiration_date": {
              "description": "string timestamp representing the start date of the booking",
              "type": "string"
          },
          "is_headline": {
              "type": "boolean"
          },
          "thread_id": {
              "type": "integer"
          }
      },
      "required": [
          "title",
          "thread_id"
      ]
  }