public CampaignStartResponse StartCampaign(int campaignId) { var campaignResponse = default(CampaignStartResponse); (CampaignStartResponse result, string statusCode, string message) = _api.Put <int, CampaignStartResponse>($"api/v1/oauth/messenger/campaign/{campaignId}/start", campaignId); if (result != null) { campaignResponse = result; } return(campaignResponse); }