WSO2 Enterprise Integrator Version - 7.1.0 ----- 3 Soap calls are made in a single API - soap

Question

when 2 soap calls are made as explained below in the code
<api xmlns="http://ws.apache.org/ns/synapse" name="StockQuoteAPI" context="/stockquote">
<resource uri-template="/view/{symbol}" methods="GET">
<inSequence>
<payloadFactory>
<format>
<m0:getQuote xmlns:m0="http://services.samples">
<m0:request>
<m0:symbol>$1</m0:symbol>
</m0:request>
</m0:getQuote>
</format>
<args>
<arg expression="get-property('uri.var.symbol')"/>
</args>
</payloadFactory>
<header name="Action" value="urn:getQuote"/>
<call>
<endpoint>
<address uri="http://localhost:9000/services/SimpleStockQuoteService" format="soap11"/>
</endpoint>
</call>
<property name="messageType" description="transformxml" scope="axis2" type="STRING" value="application/json"/>
<property name="getQuoteResponse" description="Response of getQuote" expression="json-eval($.)"/>
<header name="Action" value="urn:placeOrder"/>
<call>
<endpoint>
<address uri="http://localhost:9000/services/SimpleStockQuoteService" format="soap11"/>
</endpoint>
</call>
<property name="messageType" description="transformxml" scope="axis2" type="STRING" value="application/json"/>
<property name="placeOrderResponse" description="Response of placeOrder" expression="json-eval($.)"/>
</inSequence>
<outSequence>
</outSequence>
</resource>
</api>
We are having the getQuoteResponse (First Soap call) is always persists till the end and in the logs the getQuoteResponse is getting printed in the base64 encoded format.
We are not able to do anything with the placeOrderResponse (Second Soap call).
Kindly help to get the placeOrderResponse to be stored in a variable and getQuoteResponse shouldn't persist through the api orchestration.