struct block_reward_operation : public base_operation
{
   asset fee;
   account_id_type receiver;
   std::vector<asset> assets;
​
   extensions_type extensions;
};

[
    66,
    {
        "receiver": "1.2.0",
        "assets": [
            {
                "amount": 3606,
                "asset_id": "1.3.0"
            }
        ],
        "extensions": []
    }
]