发送数据时，axios使我将圆形结构转换为json错误

我的代码如下所示：

axios.post('https://api.sandbox.xyz.com/v1/order/new', JSON.stringify({
            "request": "/v1/order/new",
            "nonce": 123462,

            "client_order_id": "20150102-4738721",
            "symbol": "btcusd",
            "amount": "1.01",
            "price": "11.13",
            "side": "buy",
            "type": "exchange limit"
        }), config)
        .then(function(response) {
            console.log(response);
            res.json({
                data: JSON.stringify(response)
            })
        })
        .catch(function(error) {
            console.log(error);
            res.send({
                status: '500',
                message: error
            })
        });

现在说Unhandled promise rejection (rejection id: 2): TypeError: Converting circular structure to JSON 的是代码res.json({data:JSON.stringify(response)})

那么，此代码中是否缺少任何内容？

axios.post('https://api.sandbox.xyz.com/v1/order/new', JSON.stringify({
            "request": "/v1/order/new",
            "nonce": 123462,
            "client_order_id": "20150102-4738721",
            "symbol": "btcusd",
            "amount": "1.01",
            "price": "11.13",
            "side": "buy",
            "type": "exchange limit"
        }), config)
        .then(function(response) {
            res.send(response.data)
        })
        .catch(function(error) {
            res.send({
                status: '500',
                message: error
            })
        });