placing GTT orders

{
"trigger_type": "single",
"condition": {
"exchange": "NSE",
"tradingsymbol": "BOSCHLTD",
"trigger_values": [32000],
"last_price": 32130.00
},
"orders": [{
"exchange": "NSE",
"tradingsymbol": "BOSCHLTD",
"transaction_type": "BUY",
"quantity": 1,
"order_type": "LIMIT",
"product": "CNC",
"price": 32000
}]
}
above code give error 400, Bad Request
The server could not understand the request. Maybe a bad syntax? preview:- {
"status": "error",
"message": "Invalid order params." ,
"data": null,
"error_type": "InputException"

Please suggest any change in code. the code are in json