[
    {
        "Write" = [
            {
                "Data" = [
                    
                ];
                "Type" = [
                    "ListType";
                    [
                        "StructType";
                        [
                            [
                                "akey";
                                [
                                    "OptionalType";
                                    [
                                        "DataType";
                                        "String"
                                    ]
                                ]
                            ];
                            [
                                "bkey";
                                [
                                    "OptionalType";
                                    [
                                        "DataType";
                                        "String"
                                    ]
                                ]
                            ];
                            [
                                "a.subkey";
                                [
                                    "OptionalType";
                                    [
                                        "DataType";
                                        "String"
                                    ]
                                ]
                            ];
                            [
                                "b.subkey";
                                [
                                    "OptionalType";
                                    [
                                        "DataType";
                                        "String"
                                    ]
                                ]
                            ];
                            [
                                "b.value";
                                [
                                    "OptionalType";
                                    [
                                        "DataType";
                                        "Int32"
                                    ]
                                ]
                            ]
                        ]
                    ]
                ]
            }
        ]
    }
]