### 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_
if match:
            return match.groups()[-1]
    return None
SNAPSHOT_BASIC_TRANSFORMER = [
    ResponseMetaDataTransformer(),
    KeyValueBasedTransformer(
        lambda k, v: (
            v
            if (isinstance(v, str) and k.lower().endswith("id") and re.match(PATTERN_UUID, v))
            else None
        ),
        "uuid",
    ),
    RegexTransformer(PATTERN_ISO8601, "date"),
    KeyValueBasedTransformer(
        lambda k, v: (v if isinstance(v, datetime) else None), "datetime", replace_reference=False
    ),
    KeyValueBasedTransformer(
        lambda k, v: str(v)
        if (
            re.compile(r"^.*timestamp.*$", flags=re.IGNORECASE).match(k)
            or k in ("creationTime", "ingestionTime")
        )
        and not PATTERN_ISO8601.match(str(v))
        else None,
        "timestamp",
        replace_reference=False,
    ),
]