Extrinsic 7509-1

{
  "heartbeat": {
    "blockNumber": 7507,
    "sessionIndex": 125,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xfa406e5166ad849e3b541b5837e74b57290d935b6f5274fff953871a80661822580052b520b7826df85b61f8a32e31c22d7589810a259211cd28fb104f672987"
}