{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456716469",
    "entityType": "User",
    "nonce": "0x12d25a3bb50008c6d4bdedc19aa2548ef997c15e5b738832e61c648663a26720",
    "signature": "0x608a5146c7ea3e0959baef51ef33d6350566f8ac207f0f74573021b74a80a6f97eb32189a96c95206280de0c57fdce842c03aaa762b6e04e7abe3c40b05ae0d91c",
    "signer": "0xeFC9B78A20535768B9d5BCd2702b853bd5C0789c",
    "userId": "333246"
  }
}