public function addReceiver($moipAccount, $type, $fixed = null, $percentual = null, $feePayor = false)
    {
        $receiver = new stdClass();
        $receiver->moipAccount = new stdClass();
        $receiver->moipAccount->id = $moipAccount;
        if (!empty($fixed)) {
            $receiver->amount = new stdClass();
            $receiver->amount->fixed = $fixed;
        }
        if (!empty($percentual)) {
            $receiver->amount = new stdClass();
            $receiver->amount->percentual = $percentual;
        }
        $receiver->feePayor = $feePayor;
        $receiver->type = $type;

        $this->data->receivers[] = $receiver;

        return $this;
    }