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{
 "type": "string",
 "payload":{
     "call_id"        : int,
     "phone_number"   : "string",
     "caller_id"      : "string",
     "reference_id"   : "string",
     "call_direction" : "string",
     "result_code"    : "string",
     "cause_value"    : int,
     "user_id"        : int,
     "campaign_id"    : int,
     "list_id"        : int,
     "call_type"      : int,
     "recording_url"  : "string",
     "start_date_time": "DateTime",
     "end_date_time"  : "DateTime",
     "ivr_time"       : int,
     "ring_time"      : int,
     "talk_time"      : int,
     "user_time"      : int,
     "hold_time"      : int,
     "wrap_time"      : int
 }
}