{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "214565926",
    "entityType": "User",
    "nonce": "0xfe5a434bed793c535591980bfedba955e173a868ea0cc378c091228a4c90a56e",
    "signature": "0xf72a14fe7fe03c4eabe22a6e5a7937084ec5fa8933398a0574a37d8e35781d4659f4a5abde14c736778d6c69c7b9fdffbb6c2aada2b16ed8db805a042d86d87f1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}