curl --location --request POST 'https://polkadot.api.subscan.io/api/scan/metadata' \
--header 'x-api-key: 4d0c8ba32dde4a06bda83d52af49120f'{
"code": 0,
"data": {
"property1": "string",
"property2": "string"
},
"generated_at": 1699600641,
"message": "Success"
}