#i have web service call which returns text which contains json format data i ne

I think that you might have an easier time converting the resulting data to a dictionary or map using the a!fromjson function.  This will give you an object into which you can reference elements using either dot notation or the index function.

For example:   Let's say that your payload comes back from an Integration Smart Service call in a process, and you save it into a process variable called pv!result. Appian doesn't have a "Dictionary" type, but you can do something in the Data Outputs of a Script Task such as:

todatasubset(
    arrayToPage: a!fromjson(pv!result),
    pagingConfiguration: a!pagingInfo(startIndex:1, batchSize:-1)
)

If you save the result of that expression into a new process variable of type "DataSubset" called say, pv!dataPayload,  you will be able to programmatically reference all of the elements using either .dot notation:

pv!dataPayload.data.DESC

Or you could use the index function to retrieve a specific element (which is safer with respect to nulls)

index(
    index(
        pv!dataPayload,
        "data",
        null
    ),
    "STATUS",
    null
)

Hope that helps.

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