{
         "Type": "Custom::PingTester",
         "Version" : "1.0",
         "Properties" : {
            "ServiceToken": "arn:aws:sns:us-east-1:84969EXAMPLE:CRTest",
            "key1" : "string",
            "key2" : [ "list" ],
            "key3" : { "key4" : "map" }
         }
      }