MuleSoft DataWeave 2.0 script example that shows replace a single value in a payload without having to map every field.

replace_single_kv_payload.dwl

%dw 2.0
output application/json
---
payload mapObject (value, key) -> {
    // key to compare needs to be set to String type
    (if (key as String =="provisioned") {
        // if key = "provisioned", change the value to true
        "provisioned": true
    } else if (key as String =="key1"){
        // leaving this blank will remove the element
    } else {
        // otherwise output the key/value pair
        (key): (value)
    })
}

// Example payload
//{
//  "key1": "1"
//  "provisioned": false
//}