curl --request PUT \
  --url https://api.superlead.app/v1/leads/{id}/stage \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "stage_id": "<string>"
}
'

{
  "lead_id": "<string>",
  "previous_stage": {
    "id": "<string>",
    "name": "<string>"
  },
  "current_stage": {
    "id": "<string>",
    "name": "<string>"
  },
  "changed": true,
  "moved_at": "<string>"
}