Here is it an example of usage:

Edit 
				
					{
    "id": "_ID_",
    "jsonrpc": "2.0",
    "method": "hub.time.location.set",
    "params": {
          "location" : "Europe/Kiev",
          "timeEnvironmentVariable": "EET-2EEST,M3.5.0/3,M10.5.0/4"  // > for atom32 only!
     }
}
Edit 
				
					{
    "error": null,
    "id": "_ID_",
          "location" : "Europe/Kiev"
    }
}