How can I change timezone for Mysql Database? (Api didn't work)

Hello everyone! I’m having some trouble changing the time zone on mysql server.

I have an App (Hosted here) which saves the datetime to my database, (I don’t explicity tell it the date and time, I just set the field on the db to current timestamp)

Whenever my App calls for the insertion, I get the wrong timezone (4 hours later than it is)

However when I manually send the SQL for insert (also not giving it any value) the time is right.

Here’s the config from the api.

"config": {
        "default_time_zone": "America/Montevideo",
        "interactive_timeout": 50400,
        "max_allowed_packet": 67108864,
        "sql_mode": "ANSI,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION,NO_ZERO_DATE,NO_ZERO_IN_DATE,STRICT_ALL_TABLES",
        "sql_require_primary_key": **true**,
        "wait_timeout": 50400,
        "innodb_ft_min_token_size": 3,
        "innodb_ft_server_stopword_table": "",
        "innodb_print_all_deadlocks": **false**,
        "innodb_rollback_on_timeout": **false**,
        "slow_query_log": **false**,
        "long_query_time": 10,
        "backup_hour": 17,
        "backup_minute": 43
    }

Any ideas how to fix it? Thanks in advance