AWS Create Cloudformation log alert for Lambda

I want to create an alert if something goes wrong with Lambda function especially when lambda throws an exception. I am planning to configure SNS topic to send a message if that alert is triggered.

All lambdas are created using CloudFormation scripts, so I am searching for a CloudFormation template to configure alarms on CloudWatch logs. I was not able to find a good/working sample. Sample code below .

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "AWS CloudTrail API Activity Alarm Template for CloudWatch Logs",
  "Parameters" : {
      "LogGroupName" : {
          "Type" : "String",
          "Default" : "CloudTrail/DefaultLogGroup",
          "Description" : "Enter CloudWatch Logs log group name. Default is CloudTrail/DefaultLogGroup"
      },
      "Email" : {
          "Type" : "String",
          "Description" : "Email address to notify when an API activity has triggered an alarm"
      }
  },
  "Resources" : {
    "SecurityGroupChangesAlarm": {
      "Type": "AWS::CloudWatch::Alarm",
      "Properties": {
          "AlarmName" : "CloudTrailSecurityGroupChanges",
          "AlarmDescription" : "Alarms when an API call is made to create, update or delete a Security Group.",
          "AlarmActions" : [{ "Ref" : "AlarmNotificationTopic" }],
          "MetricName" : "SecurityGroupEventCount",
          "Namespace" : "CloudTrailMetrics",
          "ComparisonOperator" : "GreaterThanOrEqualToThreshold",
          "EvaluationPeriods" : "1",
          "Period" : "300",
          "Statistic" : "Sum",
          "Threshold" : "1"
      }
    },

    "AlarmNotificationTopic": {
      "Type": "AWS::SNS::Topic",
      "Properties": {
          "Subscription": [
              {
                  "Endpoint": { "Ref": "Email" },
                  "Protocol": "email"
              }
          ]
      }
    }
  }
}