API Command : what is the 'id' in params

Dear All

I'm trying to learn how to send commands using API.

I use 'Inspector' of FireFox Developer tool.

First, I try with 'engineResume' command, screen caputure of Inspector is posted at

There is 3 parameter : deviceId, type, and 'id'.
I knew the first two, but .... what is 'id' ?

Sincerely
-bino-

Ignore that parameter. You don't need to send id.

Dear Anton.

Thankyou for your help, I really appreciate.

Sincerely
-bino-