### 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 _cleanup_stacks(stacks: List[str]) -> None:
        stacks = ensure_list(stacks)
        for stack in stacks:
            try:
                cfn_client.delete_stack(StackName=stack)
            except Exception:
                LOG.debug(f"Failed to cleanup stack '{stack}'")
    return _cleanup_stacks
@pytest.fixture
def cleanup_changesets(cfn_client):
    def _cleanup_changesets(changesets: List[str]) -> None:
        changesets = ensure_list(changesets)
        for cs in changesets:
            try:
                cfn_client.delete_change_set(ChangeSetName=cs)
            except Exception:
                LOG.debug(f"Failed to cleanup changeset '{cs}'")
    return _cleanup_changesets
@dataclasses.dataclass(frozen=True)
class DeployResult: