Javadoc
The get_transferToken API is a client API used to initiate the transfer
of custody of one or more businessEntity or tModel entities from one node
to another. As previously stated, the two nodes may or may not be
distinct; intra-node transfer between two publishers is simply a
degenerate case in which node custody does not change. No actual transfer
takes place with the invocation of this API. Instead, this API obtains
permission from the custodial node, in the form of a transferToken, to
perform the transfer. The publisher who will be recipient of the
transferToken returned by this API must invoke the transfer_entities API
on the target custodial node to actually transfer the entities.