Extrinsic 44973-1

{
  "heartbeat": {
    "blockNumber": 44971,
    "sessionIndex": 749,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x289866cbc0a1d15d7b5c3a59fbd40e9b1a159df228bb5607a800f2b9ea36e04a5e4b05ba3e16b8761724d0b0a434ebeb5f04d2e22a5ebacac1bdafba7e747a8f"
}