{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3401",
    "entityType": "User",
    "nonce": "0x2dfa154fe2d085468487ba8ea6f2b8bb51e727f4e6cad8e6e8ca9f46d8bdd93f",
    "signature": "0xf3f5c166855fd43488de68b50886d1a3fd9226cf6b196b7ddbc437fb5b9f88d14414bf6e98657f38037c1aa7c84cb88783102981ca200770bf058b3273098fcd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}