Bind is to "Bind a network to a template."
Split is to "Split a combined network into individual networks for each type of device" Both use POST Source:
https://developer.cisco.com/meraki/api/#!split-network
https://developer.cisco.com/meraki/api/#!bind-network

Explanation:
To correctly configure Meraki alert settings via the API:
The endpoint is "/alertSettings" appended to the network URL.
The alert type for configuration changes is "settingsChanged".
To notify all admins, the allAdmins field must be set to True.
The HTTP method used to modify alert settings is 'PUT'.

higher-layer-if* and lower-layer-if* are marked with an asterisk indicating leaf-lists, so the tree contains two leaf-lists.

Synchronous API calls can add perceived latency because the application must wait for the server to respond before continuing.
Synchronous calls block program execution until a response is received from the server.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-
5/configuration_guide/prog/b_165_prog_3850_cg/ipxe.html