[{"senderKeyId":257835904,"senderChainKey":{"iteration":1,"seed":"Vp/+xHv0E8EB5MUEv5VpH6qDHLhT/6lHEPJuf9WBHWg="},"senderSigningKey":{"public":"BXZREPkhVTKGGJPIQkXBmRtCMZGxPAaNXEcrYHUj3Y0p"},"senderMessageKeys":[]}]