### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Sending a message with body:
`"&quot;&quot;"`
is received on the consumer side with body:
`""""`

### Expected Behavior

Sending a message with body:
"&quot;&quot;"
is received on the consumer side with body:
"&quot;&quot;"

### 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`)

Running localstack in docker desktop on Mac using helm chart

https://localstack.github.io/helm-charts
version 0.3.7
Image version: 0.14.3

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



### Environment

```markdown
- OS: macOS Monterey
- LocalStack: 0.14.3
```


### Anything else?

_No response_
name, mime_type)
                real_root = list(pseudo_root)[0]
                # Add the child elements to the already created root error element
                for child in list(real_root):
                    node.append(child)
    def _serialize_body_params(
        self,
        params: dict,
        shape: Shape,
        operation_model: OperationModel,
        mime_type: str,
    ) -> Optional[str]:
        root = self._serialize_body_params_to_xml(params, shape, operation_model, mime_type)
        self._prepare_additional_traits_in_xml(root)
        return o_string(pe)
    def _serialize_body_params_to_xml(
        self, params: dict, shape: Shape, operation_model: OperationModel, mime_type: str
    ) -> Optional[ETree.Element]:
        if shape is None:
            return
        # The botocore serializer expects `shape.serialization["name"]`, but this isn't always present for responses
        pe.name)
        pseudo_root = ETree.Element("")
        self._serialize(shape, params, pseudo_root, root_name, mime_type)
        real_root = list(pseudo_root)[0]
        return real_root
    def _serialize(
        self, shape: Shape, params: Any, xmlnode: ETree.Element, name: str, mime_type: str
    ) -> None:
        """This method dynamically invokes the correct `_serialize_type_*` method for each shape type."""
        if shape is None:
            return
        # Some output shapes define a `resultWrapper` in their serialization spec.
        # While the name would imply that the result is _wrapped_, it is actually renamed.
        if shape.serialization.get("resultWrapper"):
            name = shape.serialization.get("resultWrapper")
        try:
            method = getattr(self, "_serialize_type_%s" % shape.type_name, self._default_serialize)
            method(xmlnode, params, shape, name, mime_type)
        except (TypeError, ValueError, AttributeError) as e:
            raise ProtocolSerializerError(
                f"Invalid type when serializing {s