{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x679526fda1a20ee4a30b6b7689e5d20d97c78f3a42920c29d367b25119451815",
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    "signer": "0x951612c1Ee0f6488d23797560B4851FfB15e900a",
    "userId": "665532029"
  }
}