How to import file containig float and strings

My file I want to import contain both floats and strings. Below such line:

maciej-test.type=pomiary date=2019-02-10,time=00:19:56,MAC-Eth=b8:27:eb:60:58:d7,IP-Eth=,MAC-WiFi=b8:27:eb:35:0d:
C=0,AQI-name=0,AIQ-num=0,VOC-OK=0,SO2=-323 1549754396

The file consist of 100 such lines. When I try to import it, en error occurs:

{“error”:"unable to parse
: invalid number\nunable to parse

How can I import from one file both floats and strings? Is it file syntax related problem?
Any idea what to do?