{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "587300501",
    "entityType": "User",
    "nonce": "0xf8b69214e518e835fbf0fc049c9201e1e40823b84108a92771df894540a6cab9",
    "signature": "0xa95777372dca4313982d12a67d78be205eb90cb944458e011f01752506c147c04a86183b753db89a9d394a81d0d7fa49087c6d2614b96d0dda2517d150f288051b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}