startOrderStrategy - Multi-bracket error

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1

I have been able to place simple market orders via https://demo.tradovateapi.com/v1/order/placeorder no problem, but when it comes to creating a multibracket strategy, I get {‘errorText’: ‘Invalid or missed parameters’}. I have been following the API documentation, plus other examples throughout this forum, but I am struggling. I am not sure if this is because I am using python, but hopefully someone can spot my error below. In the end I am looking to take profit at 15pts, stop loss at 35, breakeven trigger at 10 pts, then breakeven offset at 3 pts.

Again, I am using python to send a HTTPS post request to https://demo.tradovateapi.com/v1/orderStrategy/startOrderStrategy via the requests library, and I cannot spot where the error would be. Any help would be appreciated:

def placeLongOS(live, token):

header = {
    'Authorization': f'Bearer ${token}',
    'accept': 'application/json'
        }

if live:
    url = "https://live.tradovateapi.com/v1/orderStrategy/startOrderStrategy"
else:
    url = "https://demo.tradovateapi.com/v1/orderStrategy/startOrderStrategy"

params = {
"entryVersion": {
	"orderId": 0,
	"orderQty": 1,
	"orderType": "Market",
	"timeInForce": "Day"
},
"brackets": [{
	"qty": 1,
	"profitTarget": 5,
	"stopLoss": -10,
	"trailingStop": "false"
}]

}

order = {"accountId": 0000000,
        "symbol":"MNQH3",
        "action":"Buy",
        "orderStrategyTypeId": 2,            
        "params": params
        }

res = requests.post(url, headers=header, data=order)

if res.status_code != 200:
    print("Order Failed")
    print(res.status_code)
    print(res.reason)
    print(res.text)

if res.status_code == 200:
    content = res.json()
    print(content)

token = getAccessToken(False)[0]
placeLongOS(False, token)