### 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 aws_client.dynamodb
@pytest.fixture(scope="class")
def dynamodb_resource():
    return _resource("dynamodb")
@pytest.fixture(scope="class")
def dynamodbstreams_client(aws_client):
    return aws_client.dynamodbstreams
@pytest.fixture(scope="class")
def apigateway_client(aws_client):
    return aws_client.apigateway
@pytest.fixture(scope="class")
def cognito_idp_client(aws_client):
    return aws_client.cognito_idp
@pytest.fixture(scope="class")
def iam_client(aws_client):
    return aws_client.iam
@pytest.fixture(scope="class")
def s3_client(aws_client):
    return aws_client.s3
@pytest.fixture(scope="class")
def s3_vhost_client(aws_client_factory):
    return aws_client_factory(config=botocore.config.Config(s3={"addressing_style": "virtual"})).s3
@pytest.fixture(scope="class")
def s3_presigned_client(aws_client_factory):