### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When starting the transcription job in response job object is null:

<img width="1154" alt="Screenshot 2023-04-03 at 09 21 09" src="https://user-images.githubusercontent.com/454412/229447066-1671f811-da49-478d-bf24-252f30b17699.png">


### Expected Behavior

Response from the real AWS stack - job object is not null

<img width="1161" alt="Screenshot 2023-04-03 at 09 30 13" src="https://user-images.githubusercontent.com/454412/229441498-06125248-3b68-4679-8204-0163e8245db6.png">


### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

Using test containers, reproducing project can be found here:

https://github.com/kkocel/local-stack-transcribe-repro

### Environment

```markdown
- OS: macOS
- LocalStack: latest
```


### Anything else?

_No response_
def __init__(self, region_name, account_id):
            super().__init__(region_name, account_id)
            self.attributes = {}
    return BackendDict(SampleBackend, "sns")
@pytest.fixture
def create_rest_apigw(aws_client_factory):
    rest_apis = []
    def _create_apigateway_function(**kwargs):
        region_name = kwargs.pop("region_name", None)
        apigateway_client = aws_client_factory(region_name=region_name).apigateway
        response = apigateway_client.create_rest_api(**kwargs)
        api_id = response.get("id")
        rest_apis.append((api_id, region_name))
        resources = apigateway_client.get_resources(restApiId=api_id)
        root_id = next(item for item in resources["items"] if item["path"] == "/")["id"]
        return api_id, response.get("name"), root_id
    yield _create_apigateway_function
    for rest_api_id, region_name in rest_apis:
        with contextlib.suppress(Exception):
            apigateway_client = aws_client_factory(region_name=region_name).apigateway
            apigateway_client.delete_rest_api(restApiId=rest_api_id)
@pytest.fixture
def create_rest_apigw_openapi(aws_client_factory):
    rest_apis = []
    def _create_apigateway_function(**kwargs):