Extrinsic 4334-1

{
  "heartbeat": {
    "blockNumber": 4333,
    "sessionIndex": 72,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x56b5b01bc32e2a0b3b0174a66cd435bcc6ee2b19f42fbba359058ace22b71e31c87bc75d0cc2150b9d5babb2546b90070149f8f48ba118bf11352a99f68a428a"
}