Get detail of tracking (legacy)

Legacy endpoint kept for backwards compatibility.

Prefer the modern endpoints:

• GET /serpwatcher/trackings/{tracking_id}/detail — tracking metadata together with its keyword list
• POST /serpwatcher/trackings/{tracking_id}/stats — per-keyword ranks, history and aggregated statistics over a date range

curl -X GET "https://api.mangools.com/v3/serpwatcher/trackings/string"

{
  "user_id": "string",
  "domain": "string",
  "location_id": "string",
  "location": "string",
  "platform_id": "string",
  "created_at": "string"
}