This event is fired every time a contact in your account has been updated. Event is sent to you in real time. The data payload format is the Contact Object .

{
  "type": "CONTACT_UPDATED",
  "ctime": 1619552282398,              
  "data": {
      "cid": "c_k123g456c789",  
      "flags": ["new","optin","yes"],   
      "name": "John Smith",
      "first_name": "John",
      "last_name": "Smith",
      "phone": "2025551234",
      "group": ["1"],                    
      "create_time": "02/01/2025 01:13AM EST",
      "update_time": "02/01/2025 02:13AM EST",
      "sent_time": "02/01/2025 10:13AM EST"
  }
}