{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54812",
    "entityType": "User",
    "nonce": "0xced7db99d21d1de8b0e5facbc4e8c207e0634b078d0cea8316efc5342260f15d",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}