Here is a list of all OWASP rules that should be disabled for the MAgento2 admin to work properly:
SecRuleRemoveById 981248
SecRuleRemoveById 973336
SecRuleRemoveById 958051
SecRuleRemoveById 958039
SecRuleRemoveById 973302
SecRuleRemoveById 973306
SecRuleRemoveById 973331
SecRuleRemoveById 973315
SecRuleRemoveById 973330
SecRuleRemoveById 973335
SecRuleRemoveById 973334
SecRuleRemoveById 973344
SecRuleRemoveById 973316
To disable the rules on CWP edit the file /usr/local/apache/modsecurity-owasp-old/global_disabled_rules.conf or from Admin > ModSecurity