{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2e5e96c0e576ba3c5d1dbee1e7023e7014dd28656b840757abaf8f303b7012a7",
    "signature": "0xa19620ba71d17605461f42c9d4d9c7f69c45ece1e9bca652aee9ca815599227b1a73502e2cd4c4cdf662ddd4c67b93119cfdb3edbc4b800733292c4865fa53ef1b",
    "signer": "0xb9A77dACfd704B9AFcA2988f2c7c1E92819921F3",
    "userId": "567478448"
  }
}