{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0dbd206071c84ed61583575f31cefc7484eb4e031734fc1e863f40bd443e18e7",
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    "signer": "0xB3E38cB50358DE10dc6468947392afF13158B356",
    "userId": "779977347"
  }
}