{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0x3e76ba60052549f2a839fa1ebdf8eae71b7dab5f9cd49522f07c7f49ac2be861",
    "signature": "0xfe647d6ba339fcbdedcdaa681257eee35dd19c881e8f0d62b8b938d0fbca026920f5ac61818bdd39ed2120346ba726febec2e62a3e8b0a3574117a650442947e1c",
    "signer": "0x674FFC02F71bdD4bD3Ae60c618579EBDD541E397",
    "userId": "787787230"
  }
}