Retrieves details of a specific notification by ID.

{
  "data": {
    "has_signing_key": true,
    "id": "string",
    "type": "webhook",
    "url": "string"
  },
  "error": "string",
  "pagination": {
    "current_page": 0,
    "per_page": 0,
    "total_items": 0
  },
  "success": true
}

{
  "data": null,
  "message": "Bad Request",
  "success": false
}

{
  "data": null,
  "message": "Unauthorized",
  "success": false
}

{
  "data": null,
  "message": "Notification not found",
  "success": false
}

{
  "data": null,
  "message": "Internal Server Error",
  "success": false
}