{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0x6908263dbc9cf106fef7324f6e164f8dbcf4c833f972d3c5187a33a8e2a7b3af",
    "signature": "0xd984c17756cda0d769f7bd96ec36f13f81436afac4b99040737334d0f11bcfda0cbabed9f79557058db38dcf8b03f9efbbeb3a05a1573c4a71f4c54d7673c3ed1c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}