Error during API call ARCustomers

SOLVED

Hello Team,

When I try to call ARCustomers via API using a filter that designated in the Sage 300 specification, I received an error.

Example of the request:
http://{IP Adress}/Sage300WebApi/v1.0/-/SAMLTD/AR/ARCustomers?$filter=DateLastMaintained le datetime'2021-05-31T12:00'

Response:
{
"error": {
"code": "InvalidParameters",
"message": {
"lang": "en-US",
"value": "Unrecognized 'Edm.String' literal 'datetime'2021-05-31T12:00'' at '22' in 'DateLastMaintained le datetime'2021-05-31T12:00''."
}
}
}


What I should change in the request to eliminate the error?