Configuration

    class: OpenXPKI::Server::Workflow::Activity::Tools::UpdateContextHash
    param:
       target_key: name_of_the_hash
       key1: value1
       key2: value2

This will create a single context item with key "name_of_the_hash" with a hash as value. The hash has the keys key1 and key2 with the appropiate value. You can use the _map syntax for each key/value pair, values are added if there are defined (but can be empty).