idSrc is different from the data that is sent to the server when using edit and remove

devlhl

https://editor.datatables.net/examples/advanced/jsonId.html
I use the Google developer tool to see the structure of the sending data as follows:
action:remove
data[58][DT_RowId]:row_58
data[58][id]:58 // why only remove has it？
data[58][first_name]:Bruno
data[58][last_name]:Nash
data[58][position]:Software Engineer
data[58][email]:
data[58][office]:London
data[58][extn]:6222
data[58][age]:
data[58][salary]:10000000
data[58][start_date]:2017-07-21

action:edit
data[58][first_name]:Bruno
data[58][last_name]:Nash
data[58][position]:Software Engineer
data[58][office]:London
data[58][extn]:6222
data[58][start_date]:2017-07-21
data[58][salary]:10000000