{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xcf5409ecc55b6d8b775f42ebd7bbcca78589c4240ce0cf6e1aba77db749c019f",
    "signature": "0xf4921b5000aa70f13ab69da0b6e9831ee91b5d07f93e5b3848f7e07b2a0aeb9935f7ded78dc97ad9bb26fecfb31986ca6e7951e4e1a98868503c811545a06f621b",
    "signer": "0xC75a276D0a36850045510B0483E737bCDd1F5E9b",
    "userId": "588125677"
  }
}