curl --request POST \
  --url https://chat.botpress.cloud/{webhookUrl}/messages \
  --header 'Content-Type: application/json' \
  --header 'x-user-key: <x-user-key>' \
  --data '{
  "payload": {
    "audioUrl": "<string>",
    "type": "audio"
  },
  "conversationId": "<string>"
}'

{
  "message": {
    "id": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "payload": {
      "audioUrl": "<string>",
      "type": "audio"
    },
    "userId": "<string>",
    "conversationId": "<string>"
  }
}