Party Session Initiated

{
  "metadata": {
    "topic_description": "This event indicates that a multi-party session is initiated",
    "version": "1",
    "timestamp": 1762876169,
    "topic": "transaction.party.session.initiated",
    "id": "prod1-123456-abcd-1234-ab12-c123d456e789"
  },
  "data": {
    "ancillary": {
      "party_id": "",
      "participant_unique_id2": "",
      "session_id": "00000000-0000-0000-0000-000000000001",
      "participant_unique_id1": "22222222-5555-3333333-4444444444",
      "notification_id": "1000001"
    },
    "event": {
      "status": "100",
      "client_message": "Success",
      "session_data": {
        "timestamp_date": "2026-11-11",
        "timestamp_time": "18:29:29",
        "cs_method": "GET",
        "cs_uri_stem": "/session/start",
        "cs_uri_query": "src=email",
        "cs_host": "pay.example.com",
        "cs_referer": "https://mail.example.com/",
        "cs_user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36",
        "accept_language": "en-US,en;q=0.9",
        "client_ip": "203.0.113.77",
        "edge_request_id": "8c1f2e3d4b5a6978-ATL",
        "ip_country": "US",
        "client_scheme": "https",
        "sec_ch_ua": "\"Not/A)Brand\";v=\"8\", \"Chromium\";v=\"126\", \"Google Chrome\";v=\"126\"",
        "sec_ch_ua_mobile": "?0",
        "sec_ch_ua_platform": "\"Windows\"",
        "sec_fetch_site": "cross-site"
      }
    }
  }
}