I want to send Downlink data to get Last 7 days data from RS1xx LoRa Protocol

In RS1xx LoRa, it stored history data internally called backlogs. If I want to pull that buffer data, I need to do a downlink.
I need to put this payload in downlink to get 7 days data.
{
“method”: “asRequestTargetedBacklogLIFO”,
“params”: {
“hex_data”: “10001806100D080018061A0D0800000A”
}
}

If I make it as base64 and put it here described in attached image, I can add to enqueue. But I don’t see any buffer data sending from the LoRa.

Could you please help me on this!

You can send the payload as JSON Object in the Web GUI.
However, I’m a bit doubtful that a LoRaWAN device will accept such a long JSON string.

Thanks for your reply.

I couldn’t able to sent JSON. Please check the below link, I did some research and end up to this here.