{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904559297",
    "entityType": "User",
    "nonce": "0xd3998c1d3a8ac1469cb37d9785311f2e1ea7a459634a7d34e03703c9ee8e37eb",
    "signature": "0x959a9b0d39614e119bea29357ea6cf708015fe03e42c552ed0e2d0add37fd11d53c54ff311dc15f6d3e03d022948c033d5e60b55edd93560fc468d2338d52fd21c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}