Extrinsic 17740-1

{
  "heartbeat": {
    "blockNumber": 17738,
    "sessionIndex": 295,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x0e2ddd68f21cd725447a81cfe840938d9046b3eb9269514a88c816c854527f38b313c5240e68b4da9b824b7ae5e756862d57c3414cf68a73a58ef2242fbaca88"
}