{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x377da464a5976b947b8bef79577e24d47ac2a9c94beda578e1f22b3ec55ad818",
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    "signer": "0xB38C5790DCe67E8dFc44f974540228aBF50B6356",
    "userId": "189717523"
  }
}