You must remove double quotes from Etag / Generated Number in your case that is
If-Match "1574949170141"
Your POST must be without double quotes.
If-Match 1574949170141
https://docs.vmware.com/en/VMware-NSX-Data-Center-for-vSphere/6.4/nsx_64_api.pdf
Page: 273
Starting in NSX 6.4.5, the Etag value returned in the response header of GET /api/4.0/firewall/globalroot-0/config
contains double quotes. You must strip off the double quotes before using the Etag value in the If-Match header. If you are using the PUT API request in an automation script, ensure that the script strips off the double quotes in the Etag value.