Amazon ses API V2 via postman gives "__type": "com.amazon.coral.service#UnknownOperationException"

Question

I am trying to hit amazon ses api v2 via postman, i have to integrate into influxdb directly so sdk is not an option. I am receiving 200 ok with com.amazon.coral.service#UnknownOperationException and finding it hard to get the logs. I think there is something i am doing wrong in how i am framing the request.Kindly help