Extrinsic 6615-1

{
  "heartbeat": {
    "blockNumber": 6614,
    "sessionIndex": 110,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x28754e1108f853beae1264061396bc5b0df889d27415c69b3ef720c715ef4a4f26c8073b0a457e092bcfc6dbfe0d24f05e86f64a3075785e1adec4acfe3c4c82"
}