Hi all,
I am trying to make an automation rule that will edit my 'affected services' field so that the service set is one that has the same name as the summary - see below:

Just as some background, we have set the ticket's summary to be the exact same name as the affected service we want to be associated with the ticket (i.e the desired value of affected service field). However, this does not work and has error "Error while parsing additional fields. Not valid JSON".
Is my syntax wrong or am I going the wrong way around achieving what I want?
Many thanks!