{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "154520",
    "entityType": "User",
    "nonce": "0x312ce5bddd326216157139f6ad334247a024ec5032363ae571d18a9092356ad0",
    "signature": "0x3b2915fa9df299ddc722edfdee4768353d043189dc5e54f7dd6abda8548ded3a41749ee27cd4adc42d41e31ac300b79864e89a2af7adcbccffae54b4185b41fc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}