{
  "Records": [{
    "EventSource":"aws:sns",
    "EventVersion": "1.0",
    "EventSubscriptionArn": "arn:aws:sns:us-east-1:123456789012:lambda_topic:xxx",
    "Sns": {
        "Type": "Notification",
        "MessageId": "95df01b4-ee98-5cb9-9903-4c221d41eb5e",
        "TopicArn": "arn:aws:sns:us-east-1:123456789012:lambda_topic",
        "Subject": "TestInvoke",
        "Message": "{\"msg\":true}",
        "Timestamp": "2015-04-02T07:36:57.451Z",
        "SignatureVersion": "1",
        "Signature": "xxx",
        "SigningCertUrl": "..",
        "UnsubscribeUrl": "..",
        "MessageAttributes": {"key":{"Type":"String","Value":"value"}}
    }
  }]
}