Extrinsic 29309-1

{
  "heartbeat": {
    "blockNumber": 29308,
    "sessionIndex": 488,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x48188f4a28040c65276f2fe6ac0a41f1b321a8c790441dde1e9633fbf18ecd048a30464c153e147a7820e56d48ed65bf9f74fec0fbc3fdc0c9d9135d055f5085"
}