curl -X POST '{backend_url}/admin/price-preferences' \
-H 'Authorization: Bearer {access_token}'
{
"price_preference": {
"id": "string",
"attribute": "region_id",
"value": "reg_123",
"is_tax_inclusive": true,
"created_at": "2019-08-24T14:15:22Z",
"updated_at": "2019-08-24T14:15:22Z",
"deleted_at": "2019-08-24T14:15:22Z"
}
}