axios gives me converting circular structure to json error while sending the data

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
            })
        });