{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "577283478",
    "entityType": "User",
    "nonce": "0x90e7ad3a16faf2531a3825fd02e718d01672b0c1b2c20e2dd41b54560e6b9b49",
    "signature": "0x77bcf0973c39697423db68498f21b1d812fcdde2593c7628b3d8f9fa4f36b70845bedc2d88f7b235c36b9af61b1433fbedee366f193eb638464c74ceb937fe111c",
    "signer": "0x0d0E0D19797534AEF52736C60B52793E9f88e24F",
    "userId": "603294620"
  }
}