{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "517422960",
    "entityType": "User",
    "nonce": "0xa0d4ec510b849da3582b4f2d842ecacfb740fcec49866c9b68540d98a58e9970",
    "signature": "0x944cdf6abdd405d6e9e9d6a226b327f7ac1c58ff00e3ec78c4b00cb074ec19ba6cc37c4d096b04dca6904d4d546cf682839ce1411f6796296c57d587395897ce1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}