Great question — answering as the UphillTech team:
after talking to impact radius support I got an answer. if you are "impact radius" member you can read it here: https://help.impactradius.com/hc/en-us/articles/202938699-SubID-and-SharedID . In shortly, like I said, there is a field name "subId1" and also "subId2", "subId3" and "sharedId" that you can enter any custom id you want to add. subId1 and subId 2: alphanumeric 64 characters subId3: alphanumeric 32 characters sharedId: string 32 characters. using like this: http://trackingdomain.ojrq.net/c/mpid/adid/campaignid?subId1=value1&subId2=value2&subId3=value3&sharedId=value4 . I hope it will help anyone
Full answer by Shlomi Ozon: https://stackoverflow.stackexchange.com/a/49489214 (CC BY-SA 3.0).
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