{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4338",
    "entityType": "User",
    "nonce": "0xfe7fa5a6e8933f36d3b98b602cc5d8311f3f05be5c9ff515af0ed044c39c9598",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}