{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12438",
    "entityType": "User",
    "nonce": "0x7081e81bfaba794fd8589572f514877bea2fecc725c86630d9f1b5f62471f661",
    "signature": "0x14f2c121f17d2042f522b588ed14991bc08bd13e46aa63b30a72603fa6621a642e0721a4a4ca8ee16e6628a99d804b1feb046a24e7b79fde0a3480582d26c4c71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}