{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x820beb548dfae64911ca93dc7ba57259db1f106293d93f8b441f9d8a500e4122",
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    "signer": "0xB64Be1287f50856197d925950929B286CbBcF557",
    "userId": "192184095"
  }
}