{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "599431797",
    "entityType": "User",
    "nonce": "0xfbff15c9b5b5ffbf7db352d5252244604cab850696479ebb84f83b4837519ef1",
    "signature": "0xe9b8ad2d826fb6efc26f02db3668a996721abda732779735bcc8e86f122baeac3e54e8ab93636a665e6cc61d0924e35ffd85f0ddc31d9c038005ac9505e8b2b51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}