### 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_
return opensearch_create_domain()
@pytest.fixture
def opensearch_endpoint(opensearch_client, opensearch_domain) -> str:
    status = opensearch_client.describe_domain(DomainName=opensearch_domain)["DomainStatus"]
    assert "Endpoint" in status
    return f"https://{status['Endpoint']}"
@pytest.fixture
def opensearch_document_path(opensearch_client, opensearch_endpoint):
    document = {
        "first_name": "Boba",
        "last_name": "Fett",
        "age": 41,
        "about": "I'm just a simple man, trying to make my way in the universe.",
        "interests": ["mandalorian armor", "tusken culture"],
    }
    document_path = f"{opensearch_endpoint}/bountyhunters/_doc/1"
    response = requests.put(
        document_path,
        data=json.dumps(document),
        headers={"content-type": "application/json", "Accept-encoding": "identity"},
    )
    assert response.status_code == 201, f"could not create document at: {document_path}"
    return document_path
@pytest.fixture
def cleanup_stacks(cfn_client):