{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670307808",
    "entityType": "User",
    "nonce": "0x497f7a1e248932d81a7fdc175a654bb4cd1884a60f543964b6c5a42733139d36",
    "signature": "0x7cbeeac6d1e689b2a8a3d4d341ae9ded0299d9a4c9771ca8aae0659a4bdd93840c8cd59b297057af399949f8d7497b27a0fc04feb9a5a7779c4e2fb8feb3d6a31c",
    "signer": "0x94d1769762bc3a1e7DCd3e8a31C89Ff199833Da6",
    "userId": "715573876"
  }
}