How to Access and Extract unique id's from all the rows each row having its own unique id as a key?

Question

I have a JSON nested Data in column name response of a table name data_1 as i am using JSON_EXTRACT function in my google bigquery but don't know key. talking about each row have its own key (https://i.stack.imgur.com/f1IcE.png) how to access and extract under the unique id key of nested json. as i have done till response.data.menus.

SELECT response.data.menus FROM tablename LIMIT 1000;