<#-- Using '...' instead of "..." for convenience: no need for \" escapes this way. -->
<#assign test = '{"foo":"bar", "f":4, "text":"bla bla"}'>
<#assign m = test?eval_json>

${m.foo}  <#-- prints: bar -->

<#-- Dump the whole map: -->
<#list m as k, v>
  ${k} => ${v}
</#list>