curl --request POST \
  --url https://api.chat-dash.com/v1/public/agents/{agentId}/leads/tags \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "label": "<string>"
}
'

{
  "_id": "<string>",
  "label": "<string>",
  "system": true
}