Extrinsic 7354-1

{
  "heartbeat": {
    "blockNumber": 7353,
    "sessionIndex": 122,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x20aed4f7bc7d44fae50657b43f24ddba1d3ec612c3d2c4de9c1247e87537a3358bed2f9b13e4c25593a1e0ea3334481132f113eb9b1b2b8a0b9b6f9b99cd4e87"
}