Extrinsic 7724-1

{
  "heartbeat": {
    "blockNumber": 7723,
    "sessionIndex": 128,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x583f150d417a7e2dba58d9545934b7f3a8d60a468d5f0ee2d377ac2317d97b4f31cc811f15060888a0ee9b9b2b43bd3bf5b888992e551f7eb32d333851cee282"
}