1) combine 2 lines:
sed 'N;s/\n/ /' yourFile
https://stackoverflow.com/questions/9605232/how-to-merge-every-two-lines-into-one-from-the-command-line
2) remove only first comma
sed -i.bak 's/,//' file
https://stackoverflow.com/questions/2478232/how-to-remove-first-comma-on-each-line-in-a-file
3) remove 1st space - excel - 
=trim(cell #)
https://www.excelforum.com/excel-general/1108037-remove-first-space-in-multiple-cells.html
4) find 2 uppercase letters:
=SUM((CODE(MID(A3043,ROW(INDIRECT("1:"&LEN(A3043)-1)),1))>=64)*(CODE(MID(A3043,ROW(INDIRECT("1:"&LEN(A3043)-1)),1))<=90)*(CODE(MID(A3043,ROW(INDIRECT("2:"&LEN(A3043))),1))>=64)*(CODE(MID(A3043,ROW(INDIRECT("2:"&LEN(A3043))),1))<=90))
https://stackoverflow.com/questions/34786397/find-consecutive-uppercase-letters-in-excel-column
5) txt -> json
https://sendeyo.com/onlineconverter/en/txt/json