how to pass multiple line payload in ui5?

hi,

in gateway service ,my payload would be :

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<atom:entry xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices"
xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
<atom:content type="application/xml">
<m:properties>
...................
</m:properties>
</atom:content>
<atom:link
rel="http://schemas.microsoft.com/ado/2007/08/dataservices/xxxxxxxxxxxx
type="application/atom+xml;type=feed"
title="xxxxxxxxx.xxxxxxxxxx">
<m:inline>
<atom:feed>
<atom:entry>
<atom:content type="application/xml">
<m:properties>
....................................
</m:properties>
</atom:content>
</atom:entry>

i need this multiple entries payload in ui5 create method.how would i do it?