Extrinsic 19186-1

{
  "heartbeat": {
    "blockNumber": 19185,
    "sessionIndex": 319,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xe2c44b8b7e414d37ca84ded8f16db4fe15360a118d115efdf767b740f171fb0e13b39c9b3d0b3cfcbf0f46514edb107109487e2fc52607a2b094b61a39528483"
}