{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304478",
    "entityType": "User",
    "nonce": "0xd4fd92e7c94d380eae9cc360c37aba1cf1bef4753e66499b3ea769ec34decc97",
    "signature": "0xbc64250d8d5836b581cfbfc4c6aad014f8955c1f232549854d206d7d12ff958a7e4ba1d234c51c12e4efb8cc80640bfc329112a6631f28f8e266ba20f279c20c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}