### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When calling 

`cloudWatchClient.EnableAlarmActions(&cloudwatch.EnableAlarmActionsInput{AlarmNames: alarmNames})`

with golang I receive a SerializationError with bytes in the error message saying: 

`<!DOCTYPE HTM |UBLIC "-//W3C//DTD HTML 3.2 Final//EN">.<title>500 Internal Server Error</title>.<h1>Internal Server Error</h1>.<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.`

I believe this is a bug, since other cloudwatch operations like "DescribeAlarms" work flawlessly with the same client.

### Expected Behavior

I expected the call to go through without any errors

### How are you starting LocalStack?

With a `docker run` command

### Steps To Reproduce

Start localstack, create alarms and call cloudwatch "EnableAlarmActions"

### Environment

_No response_

### Anything else?

_No response_
return f"""
{{
  "Version":"2012-10-17",
  "Statement":[
    {{
      "Effect": "Allow",
      "Principal": {{ "AWS": "*" }},
      "Action": "sqs:SendMessage",
      "Resource": "{sqs_queue_arn}",
      "Condition":{{
        "ArnEquals":{{
        "aws:SourceArn":"{sns_topic_arn}"
        }}
      }}
    }}
  ]
}}
"""