{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "64821",
    "entityType": "User",
    "nonce": "0x8b1b73587edaad198ada3ced8acf3cdeea94ff67a76c0b611b5432dfdec53828",
    "signature": "0x15459302d2eab404aa72e36280a653b58360e07bb08bfb83f61b3f63f88924151706a9adb184dbbb27f2311d99bab14c9a852a7ebe0b7eb0bb9920511c093f411c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}