Extrinsic 20560-1

{
  "heartbeat": {
    "blockNumber": 20559,
    "sessionIndex": 342,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x6e042e92039cb17c2279209658f599c522751d29dac08b60e1956e3e5dbfec368ead9f127e5c182b9b6208fd53c919db2c84fea83db8aedd47641c0bc3a61580"
}