Extrinsic 34728-1

{
  "heartbeat": {
    "blockNumber": 34726,
    "sessionIndex": 578,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xfe91176769afec4b8414e9a826551c53efdb51dcd0438fa2925c58b0f3e8260a39244b3d618633bfc148893127d23e295a04fad315127b09110ab7bfd3697583"
}