Submitting an empty data object for POST /submissions returns php error due to php array vs object with json_decode

{
    "type": "https://tools.ietf.org/html/rfc2616#section-10",
    "title": "An error occurred",
    "detail": "data.value: \"value\" must be an object",
    "violations": [
        {
            "propertyPath": "data.value",
            "message": "\"value\" must be an object"
        }
    ]
}