{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300268",
    "entityType": "User",
    "nonce": "0xe52856f99c2e645d215b84e60660a013bf05ac798f9a12a57e6817ed3f026b8b",
    "signature": "0xb9581efedb785dbec3803b30bf91a2fbb0285c15930d774f3b80b49b9380ae5b2c440b4070a38634459f1394a0266df1bf77842c6c345bd72fe1428c5529f1591c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}