cURL Response JSON RestAPI - json

Question

I need to delete some wrong data, inserted in a lot of processes, and I need to figure if this is possible with cURL and rest API, with a script in sh, batch or something like this:
curl -u admin:admin -i -H "Accept: application/json" -X GET "http://json_bpm.com/wle/v1/service/6112449?action=getData&fields=context"
First I just need the result map.
Output:
{"status":"200","data":{"result":"{\"context\":{\"name\":\"xxx\" (...)
"resultMap":{"context":{"name\":"xxx\" (...) }}}
Because I need to remove the userDelete array (see below) for thousands of processes, and set this again using curl. If you know how to remove arrays from JSON too, you're the man. :)
{
"context": {
"name": "Change Process",
"startUser": {
"user": "0001"
},
"endUser": {
"user": "0001"
},
"userDelete": {
"user": "0002"
},
"origin": "GUI",
"userAction": "Change Process"
}
}