{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16497",
    "entityType": "User",
    "nonce": "0x8340c7215ab9983d20c97d2975e9c75f88913b91afb0a66cee61d9a585320a8f",
    "signature": "0x454166f58180066e81f996094b18ff2370f652a3fb12962ed92d8028e3f4d9e8541cb96219642164ed0faf468e300339a7d0d53ec255f1010d8ceedc79ccb16b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}