{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678556080",
    "entityType": "User",
    "nonce": "0x3454aedcc5d984404466e784463c75684fb4d5e6e55189ea041e8d634f4ef788",
    "signature": "0x5d7a4c241aa8dc605a3b3efd79d5cab8d28cacb1d061a0870ab425e375df081054b5c12c3a4b1118d33871e6fe6bc63fc7c3e1a42a6405a72acbc6a527ac7b811c",
    "signer": "0xDDCce44d487ED1f7297d836241df35AAB6D867b0",
    "userId": "22610281"
  }
}