{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x4febc3ab83f9fd9d899ba82ba3defa8031656c75d9583cc189c23ca33d3ce86b",
    "signature": "0x401352ef256c723ab8c5f57d0ea46b0b16b1376cb7b61e3ac6f2255bb8b0e903464cb68ec3b839dc5aec5da0a64bf5db529521b6e154467cd37eb332cd8b279f1b",
    "signer": "0x997f52c4af8280b4e3F3F5A559DC3565DC8C8fB5",
    "userId": "337364291"
  }
}