hi @Manisha
Looks like you are almost there. I am not an Integromat expert but it looks like the query to get the columns of the selected board returned data. Are you sure that the endpoint to retrieve those columns is called when you click the “this column”?
It seems that your are not responding in Integromat, I don’t see the Integromat module that response to the webhook in your scenario.
The response should be formatted as an array of objects [{title: “what user sees”, value: “what code receives”}]. Probably you want to return the column name as the title and the columnId as the value. If you want to return also the boardId you can do this in the value by concatenating and place a separator in between them (e.g. columnId + “|” + boardId). when this is received back in the subscribe you can easily split this into separate fields.