extras/packetforge/parsegraph/nodes/payload.json

{
    "type" : "node",
    "name" : "payload",
    "layout" : [
        {
            "name" : "data",
            "size" : "bytes<<3",
            "format" : "bytearray"
        }
    ],
    "attributes" : [
        {
            "name" : "bytes",
            "size" : "16",
            "default" : "16"
        }
    ]
}