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Call a Microflow from javascript with either string as parameter or image data as "image/JPG;base64,string"

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Is it possible to directly pass a string parameter value from javascript to a Microflow? If yes, can you please guide. I tried as below but didn't work. The microflow is triggered, but the parameter object keeps being empty, I tried to save and commit as suggested  but didn’t worked. can anyone help? Tried Method 1: Method 1: function passStringToMicroflow(stringValue) { mx.data.create({ entity: "Signature.ImageNP", callback: function (obj) { obj.set('ImageNPname', stringValue); object.set('ImageNPname', stringValue); mx.data.action({ params: { applyto: "selection", actionname: "Signature.signMF", guids: [obj.getGuid()], }, }); } obj.save(); mx.data.commit(obj); }); }  Tried Method 2: by this even microflow is not triggered.  Method 2 function passStringToMicroflow(stringValue) { mx.data.create({ entity: "Signature.ImageNP", callback: function (object) { object.set('ImageNPname', stringValue); mx.processor.xasAction({ error: function () { logger.error(this.id + "error: error while executing search"); }, actionname: "Signature.signMF", guids: [object.getGUID()] }); } object.save(); mx.data.commit(object); }); } Can someone point me in the direction of what is lacking or wrong in the code above? or please suggest any other right way to do. Note: In 'stringValue' i have 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAfQAAAH0CAYAAADL1t+KAAAgAElEQVR4Xu2dXaytWVpW5.........' data. I need to save in entity so that later i can retrive the image. If any other way please suggest.  

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