"Note, that you need to be logged in under the user to be able to modify their participant custom field value."
So are you not able to automate each participants Discipline when adding them to a review? You can only modify the logged in user? Is there not a way to pass the user ID as an argument whose Discipline field you want to modify? Why would it default the update to the logged in user?
AlumniI'm afraid the JSON API functionality only allows to set participants custom field for logged-in users only.
Unfortunately, the editReview method in the ReviewService interface doesn't imply passing the user ID as a parameter of the method.
However, I think that's a good idea that may be useful for other users. So, you can submit a feature request in the correspondent community thread: https://community.smartbear.com/t5/Collaborator-Feature-Requests/idb-p/CollaboratorFeatureRequests . A lot of "kudos" under it should help our Product Management team to prioritize it.
