How to Echo committee publishes new rates for ETH and BTC

Committee members can publish feeds for committee fed asset via method in wallet api.

unlocked >>> publish_asset_feed 1.2.6 "EETH" {"base": {"amount": 1, "asset_id": "1.3.1"}, "quote": {"amount": 2, "asset_id": "1.3.0"}} true
{
"ref_block_num": 82,
"ref_block_prefix": 3601599606,
"expiration": "2020-09-27T17:05:18",
"operations": [[
14,{
"fee": {
"amount": 100,
"asset_id": "1.3.0"
},
"publisher": "1.2.6",
"asset_id": "1.3.1",
"core_exchange_rate": {
"base": {
"amount": 1,
"asset_id": "1.3.1"
},
"quote": {
"amount": 2,
"asset_id": "1.3.0"
}
},
"extensions": []
}
]
],
"extensions": [],
"signatures": [
"3d273f96b55449de25cdbc6ce598b9c876ef73ecfe0423d6aedb1e185a51e11d90f14081d81284367fd6dc2956eeda383b22eb83a1057db3e200fdc1f334900b"
],
"signed_with_echorand_key": false
}