{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304495",
    "entityType": "User",
    "nonce": "0x849466388b62913b2d3dee9c23e92008b3b3f42511206e408e16229dfbec1e1c",
    "signature": "0x29a4d91924c8f55ef413bcdd653d1f5e27b02ee6f844c2c4d18212165573bdbb2aa39a61e1a9b76c6f9dbbeb9e5a5f4b9c3583825cc2ae49ff44676688c854291c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}