curl --request POST \
  --url https://api.wegly.com.br/integrations/external/chats/{id}/scheduled-messages/{scheduledMessageId}/cancel \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reason": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "chat_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "company_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "is_scheduled": true,
  "status": "PENDING",
  "message_kind": "OPEN_MESSAGE",
  "cancel_reason": "USER_REQUEST",
  "cancel_reason_description": "<string>",
  "failure_reason": "<string>",
  "cancel_on_inbound": true,
  "scheduled_at": "2023-11-07T05:31:56Z",
  "processed_at": "2023-11-07T05:31:56Z",
  "sent_at": "2023-11-07T05:31:56Z",
  "canceled_at": "2023-11-07T05:31:56Z",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "created_by_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "sender_agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "canceled_by_user_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "payload": {
    "type": "text",
    "body": "<string>",
    "template": {
      "name": "<string>",
      "language": "<string>"
    },
    "template_fields": [
      {
        "component": "HEADER",
        "type": "TEXT",
        "index": 123,
        "button_index": 123,
        "card_index": 123,
        "value": "<string>"
      }
    ],
    "reference_wamid": "<string>"
  },
  "attachments": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "file_name": "<string>",
      "mime_type": "<string>",
      "file_size": 123
    }
  ],
  "sent_message_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}