{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340611",
    "entityType": "User",
    "nonce": "0x6c632848b5aca7831aa71029ce1544bc3f89280779bd9a86805f8b2267caf546",
    "signature": "0xd757d367f5263162a545f9b0a2b89f691a539d8550fcb8f0e9a6271c3d293e3d7a41ff6d4f5f5f055035898bfbc8339a4b667eb9cb4058de47f00e2e44177dff1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}