pyopenadr/pyopenadr/templates/signatures/prop.xml

    <Object Id="prop">
      <SignatureProperties>
        <SignatureProperty>
          <dsp:ReplayProtect xmlns:dsp="http://openadr.org/oadr-2.0b/2012/07/xmldsig-properties">
            <dsp:timestamp>{{ timestamp|datetimeformat }}</dsp:timestamp>
            <dsp:nonce>{{ nonce }}</dsp:nonce>
          </dsp:ReplayProtect>
        </SignatureProperty>
      </SignatureProperties>
    </Object>