How to upgrade service using the shell command

1

curl -u “${CATTLE_ACCESS_KEY}:${CATTLE_SECRET_KEY}”
-X POST
-H ‘Accept: application/json’
-H ‘Content-Type: application/json’
-d ‘{“inServiceStrategy”:null, “toServiceStrategy”:null}’
‘http://192.168.99.100:8080/v2-beta/projects/1a5/services/1s10/?action=upgrade’

I don’t know what information should be filled in “inServiceStrategy” and "toServiceStrategy"
hope to get your help, Thanks!