See the API's various operations for details on their request parameters and response data:

OperationMethodEndpoint
Get a user profilePOST/entity
Search for user profilesPOST/entity.find
Count user profilesPOST/entity.count
Modify a user profilePOST/entity.update
Replace a user profilePOST/entity.replace
Create a user profilePOST/entity.create
Create user profilesPOST/entity.bulkCreate
Delete a user profilePOST/entity.delete
Invalidate user access tokensPOST/entity.deleteAccess
List entity typesPOST/entityType.list
Get an entity typePOST/entityType
Create an entity typePOST/entityType.create
Create an attributePOST/entityType.addAttribute
Delete an attributePOST/entityType.removeAttribute
Create a validation rulePOST/entityType.addRule
List validation rulesPOST/entityType.rules
Delete a validation rulePOST/entityType.removeRule
Assign constraints to an attributePOST/entityType.setAttributeConstraints
Modify password history settingsPOST/entityType.setPasswordSettings
Get an access schemaPOST/entityType.getAccessSchema
Create an access schemaPOST/entityType.setAccessSchema
Delete an access schemaPOST/entityType.deleteAccessSchema