SPLIT json and parse new filed in NIFI

[#1]

"result" : "SUCCESS",
"correlationID" : "X8058296",
"generationTimestamp" : "1354",
"meHostName" : "rc01;rik2jc",
"nccVersion" : "SPS__R1",

This is my input in my nifi and i want to do changes in meHostName means i want mehostName to have 1st value like in this case rc01 and after that creating 1 more field with name devicename having second value means rik2jc

I acheived the 1st part means i configured in UpdateRecord processor 

for meHostName and it is printing 1st value means it is running fine ,now please help me in acheiving devicename to have 2nd value of meHostName which is rik2jc . i have tried split(/meHostName, ';')[1] but its not working

[#2]

You can achieve the same with a JOLT shift and this spec:

{
    "*": "&",
    "meHostName": {
        "*;*": {
            "$(0,1)": "case",
            "$(0,2)": "devicename"
        }
    }
}