badrequest.json

{
    "balance": 30,
    "accounts": [
        "/account/12345",
        "/account/67890"
    ],
    "type": "https://example.com/probs/out-of-credit",
    "title": "You do not have enough credit.",
    "detail": "Your current balance is 30, but that costs 50.",
    "instance": "/account/12345/msgs/abc"
}