odata.ODataModel vs json.JSONModel and POST

Good day, dear experts!

I need to send the data to the application in Jason format:

var sendInfo = {};

sendInfo.TEXT1 = "text data1";

sendInfo.TEXT2 = "text data2";

sendInfo.TEXT3 = "text data3";

and

sendInfo.FILECONTENT = content of file;

for sending data I need to use only POST

and the application must return MESSAGE

what the model I need to use?

sap.ui.model.odata.ODataModel();

or

sap.ui.model.json.JSONModel();

I can not read a MESSAGE if I use odata.ODataModel(); and POST

oModel.read("MESSAGE", function(){

alert("MESSAGE");

});

not work.

if I use

json.JSONModel (); and try to use the POST, data is not sending.