curl --request PATCH \
  --url https://realtime-api.voiceflow.com/v1/stable/conversation-state/{userID} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "stack": [
    {
      "diagramID": "<string>",
      "name": "<string>",
      "storage": {},
      "variables": {},
      "nodeID": "<string>",
      "commands": [
        {
          "type": "<string>"
        }
      ],
      "dynamicCommands": {}
    }
  ],
  "storage": {},
  "variables": {}
}
'

{
  "message": "<string>"
}