Extrinsic 43213-1

{
  "heartbeat": {
    "blockNumber": 43211,
    "sessionIndex": 720,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa665aa25e467bfdea8efd9c4e01a052d6cbaedf9cc9e45e090e10487e30a0e5614e4d77fc21bd9127ac8e8ec41d63fb795cd8d11f484def9e5e51825caa4af81"
}