Returned JSON with double array

One of our carriers has a replacement service that returns a json response.

In the response it has a double array defined and I am having trouble defining it in my rpg.
How do I define this correctly?

Section of returned json.

               "revenueDetails": [
                              [
                                             {
                                                            "name": "D LIFTGATE",
                                                            "description": "DELIVERY LIFTGATE",
                                                            "calc_rate": 55,
                                                            "revenue_amount": 55,
                                                            "freight_class_code": "92.5",
                                                            "id": 26
                                             },
                                             {
                                                            "name": "Minimum B",
                                                            "description": "MINIMUM CHARGE",
                                                            "calc_rate": 97,
                                                            "revenue_amount": 97,
                                                            "freight_class_code": "92.5",
                                                            "id": 170
                                             },
                                             {
                                                            "name": "Fuel Surc",
                                                            "description": "Fuel Surcharge",
                                                            "calc_rate": 0.33,
                                                            "revenue_amount": 32.01,
                                                            "freight_class_code": "92.5",
                                                            "id": 68
                                             }
                              ]
               ],

From yajlgen

num_REVENUEDETAILS int(10) inz(0);
REVENUEDETAILS varchar(1) dim(1); // empty;

From my code

    cnt_revenueDetails            Int(5);
    Dcl-ds revenueDetails         Dim(25);
      name                        Char(50);
      description                 Char(100);
      calc_rate                   Packed(7 : 3);
      revenue_amount              Packed(7 : 2);
      freight_class_code          Char(5);
      id                          Char(5);
    End-Ds;
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