I set it up as a separate shell script then run

--def exec=/pathto/Sonarrrefresh.sh

--def exec="curl 'http://localhost:8989/api/command' -X POST -d "{'name':'refreshseries'}" --header "X-Api-Key:(api key)"

does " before curl need to come out?

this is the curl script I use to update sonar

curl http://192.168.2.76:8989/api/command -X POST -d "{'name':'refreshseries'}" --header "X-Api-Key:"