{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18439726",
    "entityType": "User",
    "nonce": "0xb0000e162f845c73803315b0fb495250e23a1b5b46ef4249b9313b7eb8c40ff4",
    "signature": "0xe94e96253bdc9931c81250467a7332b00975feb43b46b4071e32e94afcc139726e61fa2e9d0764cd4a5bb4bac2e3b153df282cc8deda15730915cf6c4e7e80b21b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}