{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "875797218",
    "entityType": "User",
    "nonce": "0x0a57fb5202a838232f24f1cb28077dcc1b5e487e84d54dfb29da07d382938296",
    "signature": "0xac0406023ccf302e01f015a8c953619a0c817fda105b783680e049508c882d861bca8e54ecf076666611e708a61c0b690e307cd121965364d09f4e2866b7fc421b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}