Retrieve fills for order

{
  "error": "<string>",
  "pagination": {
    "limit": 123,
    "order": "<string>",
    "page": 123,
    "total": 123
  },
  "result": [
    {
      "client_order_id": "<string>",
      "fee": 123,
      "id": "<string>",
      "is_maker": true,
      "liquidation": true,
      "market_id": "<string>",
      "order_id": "<string>",
      "price": 123,
      "profile_id": 123,
      "side": "<string>",
      "size": 123,
      "timestamp": 123,
      "trade_id": "<string>"
    }
  ],
  "success": true
}