{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x17c13070478455cdb2d56e7d93b93dfdd06f44a280bbcb5b5a4edff50855511e",
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    "signer": "0xB40D00E36403aF3B4bdb29a43BEaE33057EE4129",
    "userId": "500138887"
  }
}