{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "977881607",
    "entityType": "User",
    "nonce": "0xd9d461a55a394bb05ab3a550d54ae2a5fe2aaa175466817a7c2425d382cbdac9",
    "signature": "0x3139ef1af7d56f66383ed33cef422366d8ebf2dc70c14a5a9a8f13e7117013a86615d240e41d8c352bbf4f34f81be9045a96a3bb5a7bf56940c0ef421cf5274f1c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}