Extrinsic 1350-1

{
  "heartbeat": {
    "blockNumber": 1348,
    "sessionIndex": 22,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xbed58d268b2a0da384de17188b93ca156c61845be433203ac2ab10b747bc304ec4c9e0cf3331ea096d3df6bc2800a09b23bfe3af2df6e4fdf8e6f420aed5b387"
}