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<?xml version="1.0" encoding="UTF-8"?> <me:env xmlns:me="http://salmon-protocol.org/ns/magic-env"> <me:data type="application/atom+xml"> $data </me:data> <me:encoding>$encoding</me:encoding> <me:alg>$algorithm</me:alg> <me:sig key_id="$keyhash">$signature</me:sig> </me:env>