Field Interaction Tracking

The request brings with it a set of form interactions, which contains a set of field interactions, which contains:

 * The NBest List (optional)
 * The input mode
 * The activity assoc'd with the field
 * The field name
 * The binding expression

Example JSON format:

{
   "forms":{
      "testForm":{
         "name":"testForm",
         "fields":{
            "testField":{
               "name":"testField",
               "totalVisits":1,
               "fieldInteractions":[
                  {
                     "nbestList":[
                        {
                           "confidence":0.25,
                           "utterance":"hello world",
                           "inputmode":"dtmf",
                           "interpretation":"hi"
                        }
                     ]
                  }
               ]
            }
         },
         "totalVisits":0
      },
      "testForm2":{
         "name":"testForm2",
         "fields":{
            "testField2":{
               "name":"testField2",
               "totalVisits":1,
               "fieldInteractions":[
                  {
                     "nbestList":[
                        {
                           "confidence":0.55,
                           "utterance":"hi again",
                           "inputmode":"voice",
                           "interpretation":"hey"
                        }
                     ]
                  }
               ]
            }
         },
         "totalVisits":0
      }
   },
   "visitLog":[

   ]
}