{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1645731",
    "entityType": "User",
    "nonce": "0xc9c5df704564ae1b325c39d491dfc60b861a01dfbf0a3385958c3e9b7b6c94c9",
    "signature": "0x3a0b20eee63d057c1092dadf6a5c960a7f7accf4adaf0b7115b1a24dcf8115fe38f06019b2eaaa68ae41777849be1e33c83bba7d2c5702021ecd9fe1175347191c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}