{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "500391732",
    "entityType": "User",
    "nonce": "0x99538e638e82ba43e5134378f544c049863907bbda0a13cdfe24bfc6c7bc23d9",
    "signature": "0xed4ca2bf62dab9816a3b3c701f7e9c09691563b8f296cebaf547733742878b371c6cdaee21bc3bae40c3b28441669dbd9ce70d990939ce615fdca7bf309cab601c",
    "signer": "0x6fb79570A836Ea8554ad1D745C12769B22f1e4E3",
    "userId": "283478"
  }
}