{ "Version": "2012-10-17", "Statement": [ { "Sid": "Statement1", "Effect": "Allow", "Principal": { "AWS": [ "arn:aws:iam::390096245597:role/roleserviceA", "arn:aws:iam::390096245597:role/roleserviceB" ] }, "Action": [ "sts:AssumeRole" ] } ] }