curl --request POST \
--url https://api.openint.dev/v0/unified/crm/metadata/objects/{object_name}/properties \
--header 'Content-Type: application/json' \
--header 'x-apikey: <api-key>' \
--header 'x-connection-id: <api-key>' \
--data '{
"id": "FirstName",
"label": "First Name",
"type": "string",
"raw_details": {}
}'