Sigfox Callback | break measurements by timestamp

Hi all,

I have a sigfox device sending 3 measurements taken every 2 minutes. In the Callback i am splitting each measurement, but in this way they all go into the data bucket with the same timestamp. Is it possible to assign to each measurement the data received timestamp (- 2 minutes, - 4 minutes and - 6 minutes) so it goes into the data bucket only one measured variable at different time?

Thank you very much for your assistance!

“device” : “{device}”,
“temperature1” : {customData#temp1},
“temperature2” : {customData#temp2},
“temperature3” : {customData#temp3},
“latitude” : 38.702716,
“longitude” : -9.274332