i need some help i have added a post call webhook on VAPI like when the call ends it sends the details to the n8n but there are some field missing such as the appointment status and i am unable to figure it out on how to add it. I even added the structured tool like in build tool that the VAPI has but if any help would be appreaciated. I tried the "{{ $json.body.message.artifact.bookingStatus }}" like the AI told me but it was considered an invalid field. https://cdn.discordapp.com/attachments/1211484481848873020/1466186933087633663/image.png?ex=697bd47d&is=697a82fd&hm=3ea94a7696f0b397085e156b9f5b99a0731fa4a00a4a86fca97684cd27a7ad4c&