need to place gtt triggers

Hi,
I am trying to place gtt triggers using kite api(php code)...
but it show error in "invalid condition param"

My part of that code is given below:(placegtt triggers)..

$o = $kite->placeGTT([
        "trigger_type" => "single",
		"exchange" => "NSE",
		"tradingsymbol" => "TATAMOTORS",
		"trigger_values" => array(95),
		"last_price" => 105.5,
		"orders" => array([
		
                "transaction_type"   => "BUY",
	            "quantity"   => 1,
	            "product"    => "CNC",
	            "order_type" => "LIMIT",
	            "price" => 96.5
				
				])
        
    ]);

so pls give solution for this issue....(error in "invalid condition param")

Thanks