dn: cn=Bob Jones,ou=Users,dc=nginx_ldap,dc=com
cn: Bob Jones
sn: Jones
objectClass: inetOrgPerson
userPassword: p@ssw0rd
uid: bjones

# ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/openldap/schema/inetorgperson.ldif
SASL/EXTERNAL authentication started
SASL username: gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth
SASL SSF: 0 adding new entry "cn=inetorgperson,cn=schema,cn=config"
ldap_add: Other (e.g., implementation specific) error (80)
additional info: olcObjectClasses: AttributeType not found: "audio"