curl --location --request GET '/api/leads///variables' \
--header 'Accept-Language;'[
{
"lead_id": 1,
"project_id": "550e8400-e29b-41d4-a716-446655440000",
"name": "last_purchase_date",
"value": "string",
"created_at": "2019-08-24T14:15:22.123Z",
"updated_at": "2019-08-24T14:15:22.123Z"
}
]