Extrinsic 400150-1

{
  "heartbeat": {
    "blockNumber": 400149,
    "sessionIndex": 6669,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb6d080433776bc1dfa61001fd539217b54d379ca95ad66c4fb91529bc2c8ab4a1df86fe9631e576471169499620fb941795a36c55aad2bd1c30f5c12ec53cf85"
}