Extrinsic 15697-1

{
  "heartbeat": {
    "blockNumber": 15696,
    "sessionIndex": 261,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc2693c384c31533373bbfb46649f08a512fad09a15c1ba13640f6b976b6ca2407b9e5897fc7172e724f01ec5f51326e3f664e5a976a298008f24a9fd22e41683"
}