[
  {
    "id": 1,
    "productId": "1",
    "user": "Alice",
    "rating": 4,
    "comment": "Great sound quality!"
  },
  {
    "id": 2,
    "productId": "2",
    "user": "Bart",
    "rating": 5,
    "comment": "A classic!"
  }
]