{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x426d864300bfd1c4632706d34516480bea7b9fc23deb78c05ffc29ac90d36542",
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    "signer": "0xC851766D49d9b625f94BD31Ff17Ffd2098860Be6",
    "userId": "656348833"
  }
}