Run smart contract get-method

Run get method of smart contract. Stack supports only num, cell and slice types:

[
{
"type": "num",
"value": "0x12a"
},
{
"type": "cell",
"value": "te6..." // base64 encoded boc with cell
},
{
"type": "slice",
"value": "te6..." // base64 encoded boc with slice
}
]