var contactfieldbody = `{ "99": "First Name", "100": "Last Name", "133": "Email", "57": "Phone" }`
var callbackFunc = function(ev){ $.ajax({ type: "POST", url: "https://logon.salesnexus.com/api/call-v1", timeout: 10000, data: "[{'function':'create-contact', 'parameters':{'login-token':'831AC892-1396-4910-B1EB-D6AEF6571A9C','contact-field-data':'" + contactfieldbody + "'}, 'request-id':'create contact'}]", dataType: "text", success: function (data) { }, error: function (result) { } }); return true; }; $('#my-button-id a').on('click', callbackFunc);