...
AddAclsResponse (Version: 0) => error_code [addition_response]
error_code => INT16
addition_response => error_code error_stringmessage
error_code => INT16
error_stringmessage => NULLABLE_STRING
The error_code field will be non-zero if the was an error that prevented processing any part of the request. If the error_code field is non-zero, the addition_response array will be empty. Otherwise, there will be an addition_response for each addition in the AddAclsRequest. These responses will be appear in the same order which the requests appeared. If the request completed successfully, error_code will be 0 and error_string message will be null. If there was an error, the error_code will be non-zero and the error_string will message will give a detailed error message describing why the addition could not be performed.
...
DeleteAclsResponse (Version: 0) => error_code [filter_response]
error_code => INT16
filter_response => error_code [matching_acl]
matching_acl => error_code error_stringmessage principal host operation permission_type
error_code => INT16
error_stringmessage => NULLABLE_STRING
principal => STRING
host => STRING
operation => INT8
permission_type => INT8
...