{"Events": [{"Date": "2012-12-07T23:05:02.660Z",
              "Message": "Cluster security group securitygroup1 has been updated. Changes need to be applied to all clusters using this cluster security group.",
              "SourceIdentifier": "securitygroup1",
              "SourceType": "cluster-security-group"}],
 "ResponseMetadata": {"RequestId": "3eeb9efe-40c5-11e2-816a-1bba29fad1f5"}}