Extrinsic 12942-1

{
  "heartbeat": {
    "blockNumber": 12941,
    "sessionIndex": 215,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xe2a3c0e8ab5cb36169e208a751d9e4283a898b47af7e6d88272fdd86f9c7052ea86271be1781a5bf0dfd28b4a6570bf3d49591a23f77780eb065e1c1d73bfa89"
}