[
  {
    "sku": "NH-001",
    "field": "price",
    "before": "8.50",
    "after": "9.75"
  },
  {
    "sku": "NH-008",
    "field": "price",
    "before": "17.25",
    "after": "18.25"
  },
  {
    "sku": "NH-012",
    "field": "availability",
    "before": "in_stock",
    "after": "out_of_stock"
  },
  {
    "sku": "NH-017",
    "field": "price",
    "before": "28.50",
    "after": "29.50"
  }
]