It is also possible to update the Attributes of other entities using the following parameters:
Right now it might not be very convenient to use these entities because the app can't retrieve a list of values - for example a list of asset_ids for all your videos.
However, you can find out these ids by navigating to the entity. For example, in the image below you can see that the Touchpoint "Coalition on Homelessness" has the touchpoint_id=56. If your locations had an Attribute "number_of_checkins" then you could update this via the API using, say, "http://api.conducttr.com/v1/project/89/lowlifes?touchpoint_id=56&checkins=12"