Extrinsic 2708-1

{
  "heartbeat": {
    "blockNumber": 2707,
    "sessionIndex": 45,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x34b415af5896eb0f166c5d05cf250b14fa900a38acb943ccf93bc7144086e354ac2c6d6f0046f90a6d8598e9097e1a163932d04ae28c0b711414808913b6e289"
}