message_type
string

Message type indicates what product this event will be used for. In this case, the message_type will be conversation

event_type
string

This is the type of event that is being sent back. This field will be present on all events and can be used to distinguish between different event types.

conversation_id
string

The unique identifier for the conversation.

properties
object

This object will contain the speech property which contains the contents of the utterance and will optionally contain the visual_context property.