{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6894900932e8e169313f9c56a8acb581cdad3601617aef8ccf78effda2fa4eb4",
    "signature": "0x50ab1f9ac287611d0825b9c00600bc3f0d77ed190199630cd2e5d57b932bc8b20e470addd27c5f521567a264b05c078e2f91e68ff6a9c495114a2df8e0db5c671c",
    "signer": "0x7e4D74Cbfc2DEDf8e5197595ee593e6CDe3C9F46",
    "userId": "300772943"
  }
}