To move an activity node to another activity node, send a HTTP POST request with the UUID of the destination node to which the activity node is to be moved, and the UUID of the activity node that is to be moved.
See Authenticating requests for information about how to authenticate the request.
Entry, Todo and Section can be moved to activities under other Entry, Todo and Activities. A Section can only be moved under an Activity.
Note that you can move a reply which has replies, so you can move a full thread to a different destination, even in a different Activity.