create submission via API with multiple choice

How can I create new submission with a multiple choice question via API?

I am using " POST /form/{id}/submissions " and it works fine for text fields and single choices but I just cannot set values for multiple choice questions.

I tried:

'submission[xx]' :'Option 1,Option 2,Option 3'

'submission[xx]' :'Option 1|Option 2|Option 3'

'submission[xx]' :[Option 1,Option 2,Option 3]

nothing above worked for me.

Can you please try using this format instead?

'submission[xx]' :['Option 1','Option 2','Option 3']

For API related issues, please also try to contact https://developers.jotform.com/ or contact api@jotform.com. I believe that our API team will be able to better assist you.

Regards.