{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904128937",
    "entityType": "User",
    "nonce": "0x4046d151d89d56ad928da61e3eb702648901040d990734a56af3ec231cb018e6",
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    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}