{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12519",
    "entityType": "User",
    "nonce": "0xac4e27b953c6b1bb987b61debd8e62ff1cd188c568ed0be76f55bc09a48bf6b7",
    "signature": "0x201c78d9920ddf1e4f9318d0c25d9d001f7d600d0f0dba2d05afc72c172ac0b27716aba45d945e774de6de6c5a23d2a2190037a779fc4f5a8bc83dcf3eb1ba3e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}