Implement receiving actions and sending response [Host]

[praveenperera]

//[PUB MOL.REQ.praveensmacbookpro.local-39536 311]
request =  {
   "action": "greeter.welcome",
   "caller": nil,
   "id": "f880a296-67cc-4c2d-857c-b015cf875dac",
   "level": 1,
   "meta": {"$repl": true},
   "params": {"name": "Praveen"},
   "parentID": nil,
   "requestID": "f880a296-67cc-4c2d-857c-b015cf875dac",
   "sender": "cli-praveensmacbookpro.local-39040",
   "stream": false,
   "timeout": 0,
   "tracing": nil,
   "ver": "4"
 }

// [PUB MOL.RES.cli-praveensmacbookpro.local-39040 160]
response =  
{
   "data": "Welcome, Praveen",
   "id": "f880a296-67cc-4c2d-857c-b015cf875dac",
   "meta": {"$repl": true},
   "sender": "praveensmacbookpro.local-39536",
   "success": true,
   "ver": "4"
 }