Action
Actions are a means of extending Common REST APIs and are defined by the resource provider, so the actions you can use depend on the implementation.
The standard action indicated by _action=create is described in Create.
Parameters
You can use the following parameters. Other parameters might depend on the specific action implementation:
_prettyPrint=true-
Format the body of the response.
_fields=field[,field...]-
Return only the specified fields in the body of the response.
The
fieldvalues are JSON pointers. For example if the resource is{"parent":{"child":"value"}},parent/childrefers to the"child":"value".If the
fieldis left blank, the server returns all default values.