{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375069",
    "entityType": "User",
    "nonce": "0x8811c2de70a6a838dac884f07446644c9a4caf89d4a9ee6880e1c7dabb6bc404",
    "signature": "0x54c0e57a4656ac8cff23cf368f9b4bc98b572dc7a16a967881ff627d604655aa3abfa77cb01ce9cf1bc17327cca17268de65cc34214e67f782f3c645e25aa4fb1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}