{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "308075",
    "entityType": "User",
    "nonce": "0x61a2091b50e6d4a697a2d0941c461a56521dc4f3fbde24e9610d99bd62fac96e",
    "signature": "0x42603365e4b247b3cbd3daef32d2ad85691ce75c3f479fb20b51ff794244ae8563d1a54e5e41cd4706000b1e04e4d20a9fbcef234649e1e3c2a7d5d23e79892e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}