Extrinsic 17620-1

{
  "heartbeat": {
    "blockNumber": 17619,
    "sessionIndex": 293,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x044facfa50ace6967ddceaf2972f1f7ed470613913523ed1b4fb6521b173d47a8fb081a8e84fadc367b0a3940d95afdf2954c5356f2e5c310300ecbe7dbb1d8c"
}