{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0x30936f9957edcf1c1503ab9d9fce7014b1139304da0325d03fe368e8f30c5415",
    "signature": "0xe602085294957b4e99e4b971c70647838e3acf091bd700f16461603f8df0b5884988594b787447911f9f649bcc377fb22dc31e2c9e8f6b2fdc97eb88dea39a661b",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}