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;