curl --request PUT \
  --url https://app.hypersender.com/api/whatsapp/v1/{instance}/react-to-message \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "chatId": "[email protected]",
  "messageId": "<string>",
  "reaction": "<string>"
}
'

{
  "key": {
    "remoteJid": "<string>",
    "fromMe": true,
    "id": "<string>"
  },
  "message": {
    "reactionMessage": {
      "key": {
        "remoteJid": "<string>",
        "fromMe": true,
        "id": "<string>"
      },
      "text": "<string>",
      "senderTimestampMs": "<string>"
    }
  },
  "messageTimestamp": "<string>",
  "status": "<string>"
}