{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645720561",
    "entityType": "User",
    "nonce": "0xdb68615804100babbaa8c3b02da929b6526fb1d1837d883912aa1ba309bf52b3",
    "signature": "0x54da61311e0387480af1c4525845f16a8d2e64214d6b19825dc5439a1bc4c80709bf1e4433a93642eb120c46f449262065d7289969b3f8bfb2901cb52156ff841c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}