### Is there an existing issue for this?

- [X] I have searched the existing issues and read the documentation

### Question

I'm trying to implement locally DLQ for SNS with SQS, the problem is, on localstack SQS DLQ message coming from SNS have different format than what you would expect in AWS

When I tested locally I received the message in the following format:

`"{\"Action\": [\"Publish\"], \"Message\": [\"(The original SNS message body here)\"], \"TopicArn\": [\"the topic arn in localstack\"], \"Version\": [\"2010-03-31\"]}"`

I'm using local stack 0.14.0 with docker-compose

my docker-compose file looks like this:


```
 aws:
    image: localstack/localstack:0.14.0
    restart: always
    volumes:
      - ./docker-mounts/localstack:/docker-entrypoint-initaws.d
    environment:
      - SERVICES=sqs,s3,ses,sns
      - DEFAULT_REGION=eu-west-1
      - HOSTNAME_EXTERNAL=aws.localtest.local
      - AWS_ACCESS_KEY_ID=foo
      - AWS_SECRET_ACCESS_KEY=bar
      - AWS_DEFAULT_REGION=eu-west-1
```

### Anything else?

_No response_
return _client
@pytest.fixture(scope="class")
def boto3_session():
    if os.environ.get("TEST_TARGET", "") == "AWS_CLOUD":
        return boto3.Session()
    return boto3.Session(
        aws_access_key_id="__test_call__",
        aws_secret_access_key="__test_key__",
    )
@pytest.fixture(scope="class")
def aws_http_client_factory(boto3_session):
    """
    Returns a factory for creating new ``SigningHttpClient`` instances using a configurable botocore request signer.
    The default signer is a SigV4QueryAuth. The credentials are extracted from the ``boto3_sessions`` fixture that
    transparently uses your global profile when TEST_TARGET=AWS_CLOUD, or test credentials when running against
    LocalStack.
    Example invocations
        client = aws_signing_http_client_factory("sqs")
        client.get("http://localhost:4566/000000000000/my-queue")
    or
        client = aws_signing_http_client_factory("dynamodb", signer_factory=SigV4Auth)
        client.post("...")
    """
    def factory(