Close but no cigar. Output is

KEY:    msgagt
VALUE:  ESM_WMB_AIX
KEY:    _id
VALUE:  severity
KEY:    e
VALUE:  AEM001
KEY:    SM_Integrator.InsertToSYSLOG
Use of uninitialized value in print at parse_4_ovo.plx line 22, <$out>
+ line 7.
VALUE:
KEY:    /DataFlowEngine/ImbRdl/ImbRdlThrowExceptionStatements.cpp: 158
+: SqlThrowExceptionStatement::execute: ComIbmComputeNode: MS_Alert_ES
+M_Integrato
Use of uninitialized value in print at parse_4_ovo.plx line 22, <$out>
+ line 9.
VALUE:
KEY:    r#FCMComposite_1_2
Use of uninitialized value in print at parse_4_ovo.plx line 22, <$out>
+ line 11.
VALUE:
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for loop on hash output ########################

_id -- severity
e -- AEM001
msgagt -- ESM_WMB_AIX
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maybe something like this, but even this is not exactly what I need:

my $data = 
qq#'msgagt=ESM_WMB_AIX,sec_id=Sec_id,severity=Low,node=test,msgnode=qw
+mbap01.cardinalhealth.net,utc={2007-04-26
18:01:59.472+00:00},om={UID=3a7affd6-f420-11db-80b1-000000000000,Alert
+Code=AEM001,AlertType=AEM-default,AppName=AEM-CommonService2,Message=
+5004:An
error has been reported by the BIPXML4C component.:XML}' #;
print "$_\n" for $data =~ /((?:\w+=\w+)|(?:\w+=\{.*?\}))/g;
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__OUTPUT__

msgagt=ESM_WMB_AIX
sec_id=Sec_id
severity=Low
node=test
msgnode=qwmbap01
UID=3a7affd6
AlertCode=AEM001
AlertType=AEM
AppName=AEM
Message=5004
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