Extrinsic 28751-1

{
  "heartbeat": {
    "blockNumber": 28750,
    "sessionIndex": 479,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x124a0344714f0be9f4e1f08788a28184cbe3df5a2f3a45f59598db0416bedc7212beb723c5ebbc6c60fcf3a701225fbcefcc8c5ca262dce853a319946f301885"
}