Here is an example that works for
order/placeOSO
{
"symbol": "ESZ4",
"isAutomated": false,
"accountId": <YOUR_ACCOUNT_ID>,
"accountSpec": "<YOUR_ACCOUNT_NAME>",
"action": "Sell",
"orderType": "Limit",
"orderQty": 1,
"price": 5788.75,
"bracket1": {
"action": "Buy",
"orderType": "Stop",
"stopPrice": 5791.75
},
"bracket2": {
"price": 5768.75,
"orderType": "Limit",
"action": "Buy"
}
}