{ "eventVersion":"1.08", "userIdentity":{ "type":"Unknown", "principalId":"111122223333", "arn":"", "accountId":"111122223333", "accessKeyId":"", "userName":"bobsmith@example.com", "onBehalfOf": { "userId": "94d00cd8-e9e6-4810-b177-b08e84725435", "identityStoreArn": "arn...