curl --request POST \
  --url https://api.zapthinker.com/router/handoff/notes/add/{instance} \
  --header 'Content-Type: application/json' \
  --header 'apikey: <api-key>' \
  --data '
{
  "remoteJid": "<string>",
  "content": "<string>",
  "author": "<string>"
}
'

{}