{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121825",
    "entityType": "User",
    "nonce": "0x4c1076e919bc54bd0098a72a37edc7e66fe1897754bfe434aa92cc833526d90d",
    "signature": "0x4c93fdd459afea2f01f2f32f1ffd480edfad4d48b0138c095acd90289de0556927f148e3b0bfa654bfa9ee5cf57fd25eae96f2baf921945a31fde44afd7a2afb1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}