...
commissionfix=!!!commission!!!
mkey={your_api_key}
The webhook target then looks like this:
https://marketing.ingenious.cloud/ts/#{FREE_PARAM_smc3}/tsa?typ=s&tst=#{TIME_STAMP}&trc=#{TRACKING_CATEGORY}&ctg=#{CONVERSION_TARGET}&sid=Sale-#{ADVERTISER_MID}&cid=#{CONVERSION_ID}&orv=#{BOOKING_AMOUNT}&orc=#{BOOKING_CURRENCY}&cli=#{FREE_PARAM_smc2}&uniqid=#{TRACKING_UUID}&commissionfix=!!!commission!!!&mkey={your_api_key}
Remember that you have to replace the tracking domain marketing.ingenious.cloud by the tracking domain of Advertiser XY of Platform B.
...