curl --request GET \
  --url https://{appid}.api-{region}.cometchat.io/v3/messages/{id}/reactions \
  --header 'apikey: <api-key>'

{
  "data": [
    {
      "id": "1",
      "messageId": "2",
      "reaction": ":reaction",
      "uid": "superhero1",
      "reactedAt": 1700210335,
      "reactedBy": {
        "uid": "superhero1",
        "name": "Iron Man",
        "status": "offline",
        "role": "default",
        "createdAt": 1698934972
      }
    },
    {
      "id": "2",
      "messageId": "2",
      "reaction": "😅",
      "uid": "superhero1",
      "reactedAt": 1700210456,
      "reactedBy": {
        "uid": "superhero1",
        "name": "Iron Man",
        "status": "offline",
        "role": "default",
        "createdAt": 1698934972
      }
    },
    {
      "id": "5",
      "messageId": "2",
      "reaction": "😒",
      "uid": "superhero2",
      "reactedAt": 1700230866,
      "reactedBy": {
        "uid": "superhero2",
        "name": "Captain America",
        "status": "offline",
        "role": "default",
        "createdAt": 1698934987,
        "conversationId": "superhero1_user_superhero2"
      }
    }
  ],
  "meta": {
    "current": {
      "limit": 100,
      "count": 3
    },
    "next": {
      "affix": "append",
      "id": "5"
    }
  }
}