{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x4747fb11bec7b8123b6b3a84e84502a409483aa55868fe7f7e0a9d4cca4909bf",
    "signature": "0xb4f9d052792511895652cc67673eaecf2115a119fa4729c42c2860529c0ca5e97e112bb87fbdd233051999bc63751c577347fdad14fa75cf0ac53e203a861e911b",
    "signer": "0x9a5ed0b3F555Cb77D9B73d00AF43BaA4F88b1487",
    "userId": "736503935"
  }
}