MQTT Engine not providing the correct data type for json payload

I’m publishing this payload to the MQTT Engine in Ignition:
{“L”: 65.0778888988495, “a”: 5.6495682209730145, “b”: 5.287174153327942}

When I view from the MQTT Engine tag browser, the datatype is set to Int8 for the values.
I need to have it as a Float8.
{
“readOnly”: true,
“dataType”: “Int8”,
“enabled”: true,
“name”: “L”,
“tagType”: “AtomicTag”
}

Is there a way to correct this?