Prepare to send an HTTP POST message to the service JSON endpoint at
http://host:port/active-bpel/services/JSON/serviceName
.
Set the POST header content-type to application/json.
Set POST payload (body content) to be the string version of the JSON request.
Include authorization headers if needed.
Send an HTTP POST message to the service JSON endpoint.

POST /active-bpel/services/JSON/humantaskProcessDemoService HTTP/1.1
Content-Length: 581
Content-Type: application/json; charset=UTF-8
Authorization: Basic YWVhZG1pbjphZWFkbWlu
Host: localhost:8080
{"loanProcessRequest":
  {"xmlns":"http:\/\/schemas.active-endpoints.com\/sample\/LoanRequest\/2008\/02\/loanRequest.xsd",
   "loanType":{"$t":"Automobile"},
   "firstName":{"$t":"John"},
   "lastName":{"$t":"Smith"},
   "dayPhone":{"$t":"2039299400"},
   "nightPhone":{"$t":"2035551212"},
   "socialSecurityNumber":{"$t":"123-45-6789"},
   "amountRequested":{"$t":"15000"},
   "loanDescription":{"$t":"Application to finance the purchase of a Toyota Prius"},
   "otherInfo":{"$t":"Down payment is US$7500"},
   "responseEmail":{"$t":"john.smith@example.com"}
  }
 }

HTTP/1.1 200 OK
Content-Type: application/json;charset=utf-8
{"status":
  {"xmlns":"http:\/\/www.active-endpoints.com\/wsdl\/humantaskdemo",
      "$t":"Thank you for applying for the Automobile loan for the amount of US$15000. Your loan is currently pending approval."
  }
}