Extrinsic 57727-1

{
  "heartbeat": {
    "blockNumber": 57726,
    "sessionIndex": 962,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xd405734328eccf7c152dbf9ff6ed77bbe55f0ec06016454ed41b68c30a899705803c10f273c57bd15ae16144c22741906d037440d021ca978d659c574bfeed84"
}