Extrinsic 174640-1

{
  "heartbeat": {
    "blockNumber": 174638,
    "sessionIndex": 2910,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xd27ea3f3688e2dbd73a6aee6aacdae51effe8b20fd1d066052a0c17076d4d34e9a3e9c0d748b2d28f84b26e932815f1a11ca9c7eea4eb47420e72b968310568c"
}