{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "713516342",
    "entityType": "User",
    "nonce": "0x5867ec37e39d1879dd7f4be5e1f21e06fbfaaa5a6655e981a013e0a53fec6cd6",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}