Get announcement banner configuration

{
  "type": "object",
  "description": "Announcement banner configuration.",
  "properties": {
    "hashId": {
      "type": "string",
      "description": "Hash of the banner data. The client detects updates by comparing hash IDs."
    },
    "isDismissible": {
      "type": "boolean",
      "description": "Flag indicating if the announcement banner can be dismissed by the user."
    },
    "isEnabled": {
      "type": "boolean",
      "description": "Flag indicating if the announcement banner is enabled or not."
    },
    "message": {
      "type": "string",
      "description": "The text on the announcement banner."
    },
    "visibility": {
      "type": "string",
      "description": "Visibility of the announcement banner.",
      "enum": [
        "public",
        "private"
      ]
    }
  },
  "additionalProperties": false
}