PollId in ForumThread Rest API

We are doing one use case POC and come across a blocker. Could anyone please help us in this. Below is the query.

We created a Thread in a Forum, which contains a Poll. 

When we fetch the Thread details using REST API: 

curl --location --request GET ' <domain-name>/api.ashx/v2/forums/10/threads.json' \
--header 'Rest-User-Token: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'


In the response, the hasPoll field is set to true. However, we are unable to fetch the pollId in the same response. 


Can you help us figure out how we can get the Id of the poll that was embedded in the Thread from the REST API response?