Extrinsic 44915-1

{
  "heartbeat": {
    "blockNumber": 44914,
    "sessionIndex": 748,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc814120b08445afcd70ca9e5bb7b58a3869bc082497cc02af3102fc2ea9b373e135db41f0c54e7b983285d82dd8179965d6d7923b4b84887248a3b5141ffe48f"
}