How to get token balance?

[danimesq]

Have tried ethereal contract call --contract=0xc944e90c64b2c07662a292be6244bdf05cda44a7 --call='balanceOf(0xDDfC2e10702d8A781727A34D83B3bb3CA94a3E91)' --from=0xDDfC2e10702d8A781727A34D83B3bb3CA94a3E91 to get the balance I hold of GRT (The Graph's token) but then:

Failed to parse call: unknown method name balanceOf

[danimesq]

Using ABI JSON:

ethereal contract call --contract=0xc944e90c64b2c07662a292be6244bdf05cda44a7 --json=abi.json --call='balanceOf(0xDDfC2e10702d8A781727A34D83B3bb3CA94a3E91)' --from=0xDDfC2e10702d8A781727A34D83B3bb3CA94a3E91

Failed to parse JSON: JSON does not contain contracts element

abi.json:

{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"name": "balance",
"type": "uint256"
}
],
"payable": false,
"type": "function"
}

[mcdee]

$ ethereal token balance --holder=0xDDfC2e10702d8A781727A34D83B3bb3CA94a3E91 --token=0xc944e90c64b2c07662a292be6244bdf05cda44a7
685