{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd95b635705ffba222f31723d21c6399dcfe4c2bd199b2bf9b7e18ed28ec5e283",
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    "signer": "0xD30489a3856C937B7dBdf90576d71e90f0F21C20",
    "userId": "447135555"
  }
}