Extrinsic 12697-1

{
  "heartbeat": {
    "blockNumber": 12695,
    "sessionIndex": 211,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x44f365868eee6309331de4ada4ca9e4adfce94a7c5011a4c79795c302964df441428c15650ff86bd7bd9396044dffc6ff717e9a734a33e5cd3d59f13dfd18080"
}