Extrinsic 61721-1

{
  "heartbeat": {
    "blockNumber": 61720,
    "sessionIndex": 1028,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x1653f0fc76d127277ae22c0cb16daffeed532bf4d4816abdbf020ca2756b16784756aa31c1c9962a96692f04a1142b88a0021e01f9619407c47a02d2a8115685"
}