curl --location --request POST '/v1.3/split_tests/update' \
--header 'access_token;' \
--header 'timestamp;' \
--header 'nonce;' \
--data-urlencode 'account_id=<ACCOUNT_ID>' \
--data-urlencode 'split_test_status=SPLIT_TEST_STATUS_NORMAL' \
--data-urlencode 'split_test_name=test split test name' \
--data-urlencode 'adgroup_id_list=[123,456]'
{
"code": 0,
"message": "",
"message_cn": ""
}