problem.json

{
    "type": "http://example.com/problems/multiple",
    "title": "Multiple Problems",
    "status": 400,
    "detail": "There were multiple problems that have occurred.",
    "instance": "/sales/products/abc123/availableForSale",
    "problems": [
      {
        "type": "http://example.com/problems/already-available",
        "title": "Cannot set product as available.",
        "detail": "Product is already Available For Sale.",
        "instance": "/sales/products/abc123/availableForSale",
      },
      {
        "type": "http://example.com/problems/no-quantity",
        "title": "Cannot set product as available.",
        "detail": "Product has no Quantity on Hand.",
        "instance": "/sales/products/abc123/availableForSale",
      }
     ]
}