Following JS (with small changes) can be used to add Marketing List/Product/Sales Literature to Campaign:
var parameters = { Campaign: { campaignid: "E5EE91B6-7A75-E811-A95F-000D3A33EB4E", //put valid if of campaign here "@odata.type": "Microsoft.Dynamics.CRM.campaign" } }; var context; if (typeof GetGlobalContext === "function") { context = GetGlobalContext(); } else { context = Xrm.Page.context; } var req = new XMLHttpRequest(); req.open("POST", context.getClientUrl() + "/api/data/v8.2/lists(2DBBE7F5-7A75-E811-A95F-000D3A33EB4E)/Microsoft.Dynamics.CRM.AddItemCampaign", true); //replace collection name and record id with record you want to add to campaign req.setRequestHeader("OData-MaxVersion", "4.0"); req.setRequestHeader("OData-Version", "4.0"); req.setRequestHeader("Accept", "application/json"); req.setRequestHeader("Content-Type", "application/json; charset=utf-8"); req.onreadystatechange = function () { if (this.readyState === 4) { req.onreadystatechange = null; if (this.status === 204) { //Success - No Return Data - Do Something } else { var errorText = this.responseText; //Error and errorText variable contains an error - do something with it } } }; req.send(JSON.stringify(parameters));