Hi,
try this one <blockcode>properties:    <#list node.properties?keys as t>
            <#– If the property exists –>
                <#if (node.properties[t]?exists)>
                   <#– If it is a date, format it accordingly–>
                   <#if node.properties[t]?is_date>
                   ${t?substring(t?last_index_of("}")+1)}:"${node.properties[t]?string("dd-MM-yyyy")}"
                   <#– If it is a boolean, format it accordingly–>
                   <#elseif node.properties[t]?is_boolean>
                   ${t}:"${node.properties[t]?string("yes", "no")}"
                   <#– If it is a sequence–>
                   <#elseif node.properties[t]?is_sequence>
                   ${t?substring(t?last_index_of("}")+1)}:[<#list node.properties[t] as item>
                            ${item}<#if item_has_next>,</#if>
                            </#list>]
                   <#– Otherwise treat it as a string –>
                   <#else>
                   ${t?substring(t?last_index_of("}")+1)}:"${node.properties[t]?js_string}"
                   </#if>
                   <#if t_has_next>,</#if>
                </#if>
             </#list></blockcode>
Regards,
Andrea