curl --request POST \
  --url https://api.eden.art/v2/sessions/react \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "message_id": "<string>",
  "reaction": "<string>"
}
'

{
  "success": true,
  "message": "<unknown>"
}