Extrinsic 25279-1

{
  "heartbeat": {
    "blockNumber": 25278,
    "sessionIndex": 421,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x5c3b691661833b0276947155203406188eafecd4029efc5076d579f342daa37b0b64c166c439b1a7ce7f9c38adca373cc6471c4a672ff201e0a3be15d784de85"
}