Need help with api call to set user presence

I am new to rocketchat and API calls but I was able to figure out how to make REST calls. Now I am looking to create a REALTIME call that will set a user status from Online to Away. The call is documented as this:

https://rocket.chat/docs/developer-guides/realtime-api/method-calls/user-presence/

{
“msg”: “method”,
“method”: “UserPresence:away”,
“id”: “42”,
“params”:
}

I can successfully connect to my webhook URL but I’m not sure how to use the above example to set a users presence. How do I specify a user? What is the “id” value? I see id:42 in other api examples and i’m not sure if thats just an example or if its required.

I’ve tried the following, setting ‘id’ with a users “_id” and also the “id” given from LDAP. Is this supposed to be some other value? With either ID it returns {“success”:true} and posts to rocket.cat bot with “User Presence Set” but the users status is unchanged. What am I missing? Thanks!

import requests
import json

uri = 'https://domain.com/hooks/abcd/1234'
data={}
data = {
    "msg": "User Presence Set",
    "method": "UserPresence:away",
    "id": "a1b2c3d4",
    "params": []
}

r = requests.post(uri, json.dumps(data)).content
print(r)

@Vinnny the _ id property is the identifier of your call. As you are calling the method via websocket, you need to define the identifier of the method call to be able to know when your method call is completed. Then when the response arrives via socket you must compare the _id to know if it’s your call that was completed. The description is here: https://rocket.chat/docs/developer-guides/realtime-api/