ValidationProblemDetails

{
    "type": "https://tools.ietf.org/html/rfc7231#section-6.5.1",
    "title": "Validation Error",
    "status": 400,
    "detail": "One or more validation errors occurred.",
    "instance": "/v1/customers",
    "errors": {
        "FirstName": [
            "'First Name' must not be empty."
        ],
        "Email": [
            "'Email' is not a valid email address."
        ]
    }
}