gistfile1.json

[
    [
        ":return", 
        [
            ":ok", 
            "9 : Integer", 
            [
                [
                    "0", 
                    "1", 
                    [
                        [
                            ":decor", 
                            ":data"
                        ]
                    ]
                ], 
                [
                    "4", 
                    "7", 
                    [
                        [
                            ":decor", 
                            ":type"
                        ]
                    ]
                ]
            ]
        ], 
        "1"
    ]
]

case class Outer(result: List[Return])   // outer [ ... ]
case class Return(responseType: String, response: List[Response], one: Int) // [ ":return", [ ... ], "1" ]  (not sure what the "1" is yet)
case class Response(status: String, output: String, tokens: List[List[Token]]) // [ ":ok", "9 : Integer", [ [ ... ] ] ]
case class Token(startChar: Int, length: Int, metadata: List[List[Metadata]])
case class Metadata(label: String, tokenType: String)  // ":decor", ":data"