By "2nd part part of the line", I assume you mean the 2nd field. As you process each record and the relevant fields, the real issue is the construction of a suitable selection that determines whether the first character is a "{".

Personally, I would want to check for a data value that is surrounded by "{" and "}" if that is the definitive trigger for data that needs to be ignored (as in the example you provided).

Assuming the 2nd field is in a variable named ${F2} and using the ksh:

if [[ ${F2} = {*} ]] then

may work (I haven't tried it...)

Alternatively, for more complex comparisons, you may want to try regular expression through egrep and check the return code.