Speech biasing using Actions builder webhook fulfillment

Question

I'm following the attached article for fulfillment webhook response formats. https://developers.google.com/assistant/conversational/webhooks?tool=sdk#provide_speech_biasing

For some reason once I add the speech biasing section, the webhook fails with the error message "Unsuccessful webhook call: Failed to translate JSON to ExecuteHttpResponse.. "

Sample request: Webhook format

Is there anything specific I'm missing?

Answer 1

Looks like the documentation is wrong.

Documentation

But the expected format(it is languageCode and a list of strings for speech)

Expected format