{
    "_yql_row_spec" = {
        "UseNativeYtTypes" = %true;
        "Type" = [
            "StructType";
            [
                [
                    "$timestamp";
                    [
                        "OptionalType";
                        [
                            "DataType";
                            "Uint64"
                        ]
                    ];
                ];
                [
                    "$cumulative_data_weight";
                    [
                        "OptionalType";
                        [
                            "DataType";
                            "Int64"
                        ]
                    ];
                ];
                [
                    "int64_field";
                    [
                        "OptionalType";
                        [
                            "DataType";
                            "Int64"
                        ]
                    ];
                ];
                [
                    "nested_struct_field";
                    [
                        "StructType";
                        [
                            [
                                "bool_field";
                                [
                                    "DataType";
                                    "Bool"
                                ];
                            ];
                            [
                                "string_field";
                                [
                                    "DataType";
                                    "String"
                                ];
                            ];
                        ];
                    ];
                ];
            ]
        ]
    };
    "schema" = <
        "strict" = %true;
        "unique_keys" = %false;
    > [
        {
            "name" = "$timestamp";
            "type" = "uint64";
            "required" = %false;
        };
        {
            "name" = "$cumulative_data_weight";
            "type" = "int64";
            "required" = %false;
        };
        {
            "name" = "int64_field";
            "type" = "int64";
            "required" = %false;
        };
        {
            "name" = "nested_struct_field";
            "type_v3" = {
                "type_name" = "struct";
                "members" = [
                    {
                        "name" = "bool_field";
                        "type" = "bool";
                        "required" = %true;
                    };
                    {
                        "name" = "string_field";
                        "type" = "string";
                        "required" = %true;
                    };
                ];
            };
        };
    ];
    "_yql_dynamic" = %true;
    "_yql_dynamic_native_write" = %true;
}