Extrinsic 390460-1

{
  "heartbeat": {
    "blockNumber": 390459,
    "sessionIndex": 6507,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9075432205ef9ddd7c65e8d819bce3dc3978d6297e43fbf77c41eba19f11236cdf5135d7016e3d3bc2d1c397587cbb2e04bfd10beadcac354a162abd95d12583"
}