REST service causes error when called from Swagger

Question

When I call this REST service endpoint:

    [HttpPost]
    [Route("call-history")]
    public async Task<IActionResult> CallHistory([FromBody] InputHistory body)
    {
        if (body == null)
        {
            return BadRequest("Invalid JSON Data");
        }

        var token = await _keycloakService.GetBearerTokenAsync();
        var result = await _apiService.CallHistoryRestServiceAsync(token, body);

        return Ok(result);
    }

    public class InputHistory
    {
        public string MessageID { get; set; }
        public string User { get; set; }
        public DateTime TimeStamp { get; set; }
        public string CarrierSerialNumber { get; set; }
    }

from Swagger, I get this error:

{
  "type": "https://tools.ietf.org/html/rfc7231#section-6.5.1",
  "title": "One or more validation errors occurred.",
  "status": 400,
  "traceId": "00-5814943806d8d6a58972cb020cc34fcf-5f2d0e3c07954b30-00",
  "errors": {
    "$": [
      "The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. Path: $ | LineNumber: 0 | BytePositionInLine: 0."
    ],
    "body": [
      "The body field is required."
    ]
  }
}

request :

{ "messageID": "string", "user": "string", "timestamp": "2025-02-28T08:49:19.129Z", "carrierSerialNumber": "string" }

I cannot find solution :(