public function captureOrderAmount($captureAmount, $amazonAuthorizationId)
    {
        $captureRequest = new OffAmazonPaymentsService_Model_CaptureRequest();
        $captureRequest->setSellerId($this->_sellerId);
        $captureRequest->setAmazonAuthorizationId($amazonAuthorizationId);
        $captureRequest->setCaptureReferenceId($this->_captureReferenceId);
        $captureRequest->setCaptureAmount(new OffAmazonPaymentsService_Model_Price());
        $captureRequest->getCaptureAmount()->setAmount($captureAmount);
        $captureRequest->getCaptureAmount()->setCurrencyCode($this->_service->getMerchantValues()->getCurrency());
         
        return $this->_service->capture($captureRequest);
    }