{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "818521868",
    "entityType": "User",
    "nonce": "0x9064904f469d9f79bf6dbc534d04a8d41ca7480efc6f0dcd47c72c97fa323c58",
    "signature": "0x48a7f31737bd9df33adc00520b0119e1cb7d3c8b6774a7dd529c87083104e9cb11d12cbc7c8f1f3925232d459d3096c43440dabb33d020bcde2d1889bc4a9ab11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}