{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x5599d0f191184679afd15dbee22b33fd030a2cb0581687a545b71a193b02e0c8",
    "signature": "0xaf89c50414497f02952f9c84ec10c16a912d12722427631b5d3c03d7df3f8f6d1e662595874da7420f94eed5bc9045bcdff8b636eaf5d86b2ef3efeb07e4ed2f1b",
    "signer": "0x630980A3A6b695C7099AD6f4D467D393A76106Ff",
    "userId": "315465903"
  }
}