Extrinsic 400778-1

{
  "heartbeat": {
    "blockNumber": 400777,
    "sessionIndex": 6679,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0652c830bde7204ee85ae4167ddd636e147723d276b9b7f2b87cf46bdc18222655902595957ca0d87fa621acd3376c2780bc682711fdd2c764e86aec4098e285"
}