Extrinsic 3156-1

{
  "heartbeat": {
    "blockNumber": 3155,
    "sessionIndex": 52,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8e79d9895dd8582720867625d3e088dd82be74ff058434af4db81341fc27793fd8ec555bdb6db8bb34c7f8665f8710cb664d9ab3a9c6f44521b23d19e3d4de89"
}