{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "849737890",
    "entityType": "User",
    "nonce": "0xb7c3ca443019dbfbd0946ea72fc3e680b7cf85c09fe4d988a592406e1e4fc3d3",
    "signature": "0xfa58acdeb2e1171ab6f6c1a7c4594b7cd3ab5afc0607ff430dd2b5c6139fc6515ca245cad36c1605c93bba18aff9320d3534cb1fe5b4e5a042c17fdd1ef393bf1b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}