Event Type: invite

invite[Object Invite]: Invite Information
- inviter_id[String]: Inviter ID
- inviter_phone[Object Phone]: Inviter Phone Number
  - country_code[* Integer]: Country Code, Compliant with ITU E.164 standard, without '+ sign', without prefix 0, example: 86
  - phone_number[* String]: Phone Number, without '+ sign'
- invite_code[String]: Invite Code
- invite_medium[String]: Invite Medium

{
    "invite": {
        "inviter_id": "567890",
        "inviter_phone": {
            "country_code": 1,
            "phone_number": "18700001112"
        },
        "invite_code": "NOHHD",
        "invite_medium": "WeChat"
    }
}