var credentials = new StoredProfileAWSCredentials("dev");

                using (var client = new AmazonSimpleNotificationServiceClient(credentials, Amazon.RegionEndpoint.EUWest1))
                {
                    var request = new PublishRequest();
                    request.Message = message;
                    request.TargetArn = "ARN";

                    var response = client.Publish(request);
                    // return response;
                }

{
   "Type":"Notification",
   "MessageId":"3333333",
   "TopicArn":"ARN",
   "Message":{"Id":45,
   "MessageId":"a871f8d7-7091-4548-87c5-da3bb4131044",
   "Payload":"{"   Internalid":"a7c50558-fc9c-47a6-b0ed-cb0cf5020f55",
   "MessageId":"a871f8d7-7091-4548-87c5-da3bb4131044",
   "TravelersName":"aaa aaaa",
   "TravelersEmail":"aaa@aa.com",
   "OwnersEmail":null,
   "AccommodationId":1,
   "BookingCode":"a523cd07-5506-48ad-9380-2e94002722e0"
}","EventName":"BookingRecordCreated",
"CreatedOnUtc":"2016-09-26T15:14:55.437",
"HandledOnUtc":null},
"Timestamp":"2016-09-26T15:14:50.923Z",
"SignatureVersion":"1",
"Signature":"dfgdfg///==",
"SigningCertURL":"https://sns",
"UnsubscribeURL":"https://sns."
}

"Message":{"Id":45,
   "MessageId":"a871f8d7-7091-4548-87c5-da3bb4131044",
   "Payload":"{"   Internalid":"a7c50558-fc9c-47a6-b0ed-cb0cf5020f55",
   "MessageId":"a871f8d7-7091-4548-87c5-da3bb4131044",
   "TravelersName":"aa aaa",
   "TravelersEmail":"aa@aaa.com",
   "OwnersEmail":null,
   "AccommodationId":1,
   "BookingCode":"a523cd07-5506-48ad-9380-2e94002722e0",
   "EventName":"BookingRecordCreated",
   "CreatedOnUtc":"2016-09-26T15:14:55.437",
   "HandledOnUtc":null},