Extrinsic 123616-1

{
  "heartbeat": {
    "blockNumber": 123615,
    "sessionIndex": 2060,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x18476fcbd828ea3484b68f7f4b5f32eb518291939a9b6ed61f44476fe142a03818ba2c9e4cb12186b22c1160528d7b13218dae8892e5cc790c7bce803fa5538c"
}