Extrinsic 174644-1

{
  "heartbeat": {
    "blockNumber": 174642,
    "sessionIndex": 2910,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x544bf1ab8586d6d7d3119a1060184f3c892f412350ed941f0a9a7c5f9015ec21b8f8ea7c75a1e04427010c4e6583de74970b10a88a616b45f26d79119eca7e82"
}