Here is the base64 of the payload DgAAEAgGMn0FAOMLAc4=
If we decode that using this site http://tomeko.net/online_tools/base64.php?lang=en
we get
0x0E 0×00 0×00 0×10 0×08 0×06 0×32 0x7D 0×05 0×00 0xE3 0x0B 0×01 0xCE
Here Temperature is 01CE, which is binary 0000 0001 1100 1110
I am not sure how to convert this into decimal temperature value.