### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

```
An error occurred (500) when calling the CreateGrant operation (reached max retries: 4): <!DOCTYPE HTML PUBLIC "-//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.</p>
```

### Expected Behavior

_No response_

### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    helm install localstack/localstack

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

    aws kms create-grant --key-id=738f46cb-444b-4fc5-9c6f-8c1165279dbb --grantee-principal=arn:aws:iam::000000000000:role/test --operations=Encrypt


### Environment

```markdown
- OS: 
- LocalStack: 0.12.17
```


### Anything else?

_No response_
import json
import logging
from localstack.services.generic_proxy import ProxyListener
from localstack.utils.analytics import event_publisher
from localstack.utils.common import to_str
LOG = logging.getLogger(__name__)
EVENT_KMS_CREATE_KEY = "kms.ck"
class ProxyListenerKMS(ProxyListener):
    def forward_request(self, method, path, data, headers):
        action = headers.get("X-Amz-Target") or ""
        if action.endswith(".CreateKey"):
            data1 = json.loads(to_str(data))
            descr = data1.get("Description") or ""
            event_publisher.fire_event(EVENT_KMS_CREATE_KEY, {"k": event_publisher.get_hash(descr)})
        return True
UPDATE_KMS = ProxyListenerKMS()