Extrinsic 12934-1

{
  "heartbeat": {
    "blockNumber": 12932,
    "sessionIndex": 215,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xa69357082c867071629bbb0d76e8c3b3e1969bfe0cfe3d3f28974aaa55b3b9112e8fa582ff2f12769f59c46f602709400ef76f48aa32fdc503f05db92ab5c78c"
}