Реализация

// Represent user lead data for single column
message UserLeadColumnData {
  // Human-readable text of the field type (e.g.: Full Name,  What is your
  // preferred dealership?). This field might not always be populated.
  optional string column_name = 1;

  // Column value based on column type
  oneof column_value {
    string string_value = 2;
  }
  // Column id. Populated for all types of fields. (e.g.: FULL_NAME)
  optional string column_id = 3;
}

// Message to construct webhook JSON payload
message WebhookLead {
  // Unique id to represent lead
  optional string lead_id = 1;
  // User inputted data per column
  repeated UserLeadColumnData user_column_data = 2;
  // API version
  optional string api_version = 3;
  // Form id to which lead belonged to.
  optional int64 form_id = 4;
  // Campaign id that the lead form is associated with
  optional int64 campaign_id = 5;
  // Key to be used by advertiser to verify the request
  // is from Google.
  optional string google_key = 6;
  // Denotes if the lead is a test lead.
  optional bool is_test = 7;
  // Click ID for the lead submission.
  optional string gcl_id = 8;
  // Adgroup id which generated the lead.
  optional int64 adgroup_id = 9;
  // Creative id which generated the lead.
  optional int64 creative_id = 10;
  // Asset group id represents the container for holding assets, associated
  // urls, hints and criteria that will be used to select assets and for
  // optimization. This field is only populated for Performance Max campaigns.
  int64 asset_group_id = 11;
}