{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1590197",
    "entityType": "User",
    "nonce": "0xa288907ed42f861f33a0f8560a18b588e8ca4c7b1cf8b986fe3975eb94f04597",
    "signature": "0x500ad816d47b7f417414154e8f5d69cc7d10dc5e4aef988c5eb9f27bc60657183fa6ff947b25df35907c3ec2f5bfb37e0da059e445298b2f1a1af23ba2cef57d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}