Update and fix audiences request

[wuservices]

The current audience request for GA4 audiences from this MC does not work and is not a valid request for GA4.

We were using this and seeing 0 data in Google Ads, and Google Ads support noticed we were not sending a request with v=2, which is sent for GA4 audience requests. v=1 is the legacy version associated with (now dead) Universal Analytics.

We see v=1 in this MC, https://github.com/managed-components/google-analytics-4/blob/a37816ab86a7750cab6ef8546707365e08bde2db/src/index.ts#L23

but the implementation and data structure looks like it was copied from the Universal Analytics MC logic.

If I run the Google Tag, I see a request like this with v2, and different fields:

https://analytics.google.com/g/collect with the following parameters:

• v=2
• tid=[Tag ID]
• gtm=
• _p=
• _gaz=
• gcs=G111 [consent v2]
• gcd
• npa
• dma
• tag_exp
• cid
• ul
• sr
• uaa
• uab
• uafvl
• uamb
• uam
• uap
• uapv
• uaw
• are
• pae
• frm
• pscdl
• _s
• sid
• sct
• seg
• dl
• en=page_view
• _ee
• tfd

There are multiple reports of issues with Zaraz GA4 and audiences in #zaraz Discord.

There's also a request made for https://td.doubleclick.net/td/ga/rul with many params, which isn't part of this MC. Not sure if that's for a different type of tracking though.

[m-muiznieks]

Yes, this is a thing for me as well.