How to Parse JSON objects?

Hello all, I’m trying to use data coming from a JSON file but I cannot find the right way to do so. 

I’m struggling on how the data is coming from another tool and make it available to use.

JSON I’m getting looks like this

{
"headings":
[{"name":"KEY","table":"SQL","type":"STRING"},{"name":"CREATED","table":"SQL","type":"DATE"},{"name":"REG_PLATE","table":"SQL","type":"STRING"},{"name":"MAKE_SLUG","table":"SQL","type":"STRING"},{"name":"CANONICAL_MODEL_SLUG","table":"SQL","type":"STRING"},{"name":"MODEL_SLUG","table":"SQL","type":"STRING"},{"name":"MODEL_NAME","table":"SQL","type":"STRING"},{"name":"PRICE","table":"SQL","type":"INT"},{"name":"MARKET_VALUE","table":"SQL","type":"INT"},{"name":"MILEAGE","table":"SQL","type":"INT"},{"name":"MODEL_YEAR","table":"SQL","type":"STRING"},{"name":"REG_YEAR","table":"SQL","type":"INT"},{"name":"COLOUR","table":"SQL","type":"STRING"},{"name":"GENERIC_COLOUR","table":"SQL","type":"STRING"}],
"rows": [
{"cells":["AAAA","2022-05-01","AAAA","Ford","fiesta-active","fiesta-active","Fiesta Active","14499","16320","2834","2019","2019","Metallic - Moondust silver","Silver"]}
,{"cells":["BBBB","2022-05-01","BBBB","MINI","3-door-hatch","3-door-hatch-2018","3-Door Hatch","14500",null,"12464","2019","2019","Metallic - Starlight blue","Blue"]}
]
}

And what I’m trying to do is to have

KEY: "AAAA"
CREATED:"2022-05-01"
REG_PLATE:"AAAA"
MAKE_SLUG:"Ford"
CANONICAL_MODEL_SLUG:"fiesta-active"
MODEL_SLUG:"fiesta-active"
MODEL_NAME:"Fiesta Active"
PRICE:"14499"
MARKET_VALUE:"16320"
MILEAGE:"2834"
ODEL_YEAR:"2019"
REG_YEAR:"2019"
COLOUR:"Metallic - Moondust silver"
GENERIC_COLOUR:"Silver"

So each one of the names are a column and the rows stay as rows so I can pass this to a google/sheet.

I’ve been looking at several related posts but I’m not being able to find anything related.

Any help please