Extrinsic 17323-1

{
  "heartbeat": {
    "blockNumber": 17322,
    "sessionIndex": 288,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x0e4a4590bc3049f448c68a625abbb210ca1afd1947774368e12efc90dc8fa66fedb0ea014c17dcfe06c5801d063b4ae7c95e273f4279876ce7bddf78d7288b87"
}