Arduino ESP32 FreeRTOS - How to declare empty byte array in task

Question

I have the following FreeRTOS function:

void UARTSendCommand(void *pvParameters)
{
  (void) pvParameters;
  uint8_t receive[];  //***** NEED TO DO A EMPTY ARRAY 
  for (;;) 
    {
      xSemaphoreTake(xCountingSemaphore, portMAX_DELAY);
      xQueueReceive(queue, &receive, 0);
      if(receive)
      {
        Serial.println("UART Send command received");
        uart_write_bytes(UARTNUM, (const char*) receive, sizeof(receive));
      }
      xSemaphoreGive(xCountingSemaphore);
      vTaskDelay(1);
  }
}

The Queue is declared as:

 UARTSendQueue = xQueueCreate(10, sizeof(char));

And when I send to queue I do this:

byte message[] = {0x5A, 0xA5, 0x05, 0x82, 0x20, 0x00, (gaugeImage >> 8) & 0xFF, gaugeImage & 0xFF };
      xSemaphoreTake(xCountingSemaphore, portMAX_DELAY); 
      xQueueSend(queue, &message, 0);
      xSemaphoreGive(xCountingSemaphore);

What I need is to get in my Task function the parameter sent in the queue, but I don't get anything.

Any clue?