{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "578849678",
    "entityType": "User",
    "nonce": "0xeb816da168950c796a8bf6050273ec230f6d4b96ca3d7cc1f99e83ab1a2b4806",
    "signature": "0x87c8a709e5658de1326d9458840fc04444ecc53f4e3c17507dfc166abb1590ed6f730f11d73a6e1dc8a4d08b20b04cae41851b3ec7cfb6c0d494bdc50913f8001c",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}