{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904709618",
    "entityType": "User",
    "nonce": "0x599a872e3be50f3ad88850672f4c6b586f96f3c3fed4be4d6ecef43f782b8fb7",
    "signature": "0xef09ddd86b4883287ca774cbf072c6a46939889dec76ddb4fdd05b065fb52a2c44bc85277e1847eb08ad673887e64003b20344653b5189f6be8560c2789f53e41c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}