No variables in Bucket

No variables in Bucket

Good day

I want to send uplink data from Chirpstack to Tagoio. I decoded the payload in Chirpstack and I'm getting just one variable value for the decoded uplink in Tagoio:
"variable": "objectJSON", "value":{\"alarm\":\"FALSE\",\"door_open_status\":\"OPEN\",\"door_open_times\":28,\"last_door_open_duration\":12,\"time\":\"2022-09-16 15:50:00\"}", "serie": 1663336202474
How can I get there variables and values split and correctly converted into the buckets?