{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xd7c3cb17c75a403eea14842096bab5647341ae97eb777455d67f3e97c2f90e94",
    "signature": "0xf4be23145972d2c1610a1f7b8b919d94bfb8e6c2173d0574c872f80a7460949a51b9ffcc8e8379fda4d94ca2951fb661b08d3dcbdaaee293a09576721dba4ec51c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}