{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "856877663",
    "entityType": "User",
    "nonce": "0x66cc906eb64eacf5859b669d275235ab54875ca0689e19432f32ef78bb30ea8a",
    "signature": "0xb46d56b7fff3a24b54836e3a8f0f5ce6ba6b2935c3346c97e1c4679c00dfae2e2bbe676a0e1cf5355df7cf1c6dc6153c2f27bddd7bdb6ff72733cf548ef862e21b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}