{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12615893",
    "entityType": "User",
    "nonce": "0xcca3843b3e56efba53bf45ded56c3eaa00a454c8a98c3b4a39d59910afc39e4c",
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    "signer": "0xD421e37d15105099410eABCBa242D0Ab3E985ab4",
    "userId": "807549804"
  }
}