Few things to remember when you use DCS API
1. Make sure all your signal are mapped to a trait (it can takes up to 4hr to replicate into the AAM) before you send any data Via the DCS API
2. We are update traits customer data via DCS so the format for customer tracking id as follow
d_cid=<datasource id>%01<traacking id>
i.e d_cid=111111%01xxxxxxx-d1c5-40e2-b22d-7c1be3c2aade
make sure to pass %01 (not decoded)
3. Make sure the you get specific AAM endpoint from adobe client-care based on your company and edge location
Thanks
Abu