In the meantime ODATA services should have write-support.
Take a look here:
http://help.sap.com/saphelp_nw74/helpdata/de/91/f2a6ac6f4d1014b6dd926db0e91070/content.htm?frameset=/de/3c/f61c59b2ce423993c3af8218b7817c/frameset.htm
Any perhaps this question would be better placed in the sapui5 dev. center
If your app is coded with SAPUI5 
Greets,
Ben