{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "111540320",
    "entityType": "User",
    "nonce": "0xc4de5cb551ff08317c0da74833491294f6550ce62c5f717908ed491cce46c5a5",
    "signature": "0xb206c2c0a38e3f35ba3728af89e4a085c1761f31459d5a8cc1b9172525c5f7ec03fefa607791b71ae9c5b6d2f844a2319f8dadcfb837583debb1c431e66bd9e41b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}