OrdersService ordersService = IntxServiceFactory.createOrdersService(client);
CreateOrderRequest request = new CreateOrderRequest.Builder()
    .instrument("BTC-PERP")
    .side("BUY")
    .size("0.0001")
    .orderType("LIMIT")
    .price("50000")
    .tif("GTC")
    .clientOrderId("1234567890")
    .build();
CreateOrderResponse response = ordersService.createOrder(request);

For more information, please visit the INTX Java SDK.