Regarding Websocket 'ft'

Is the “ft” exchange time stamp or when the feed is received to me on my computer timestamp?

With a WebSocket API, you can receive quotes for all scrips across all Indian Exchanges during the market hours. The feeds are usually classified into two categories, Market Feed and Depth Feed. For every new connection, you will receive an acknowledgment (usually represented as “tk”) followed by the exchange feed (usually represented as “tf”).

I know that. But in “ft” which is the feed time. Is it exchange time stamp or when we receive the feed timestamp

when we receive the feed timestamp.