{
  "manageEntity": {
    "action": "Save",
    "entityId": "527594113",
    "entityType": "Track",
    "nonce": "0xb90bc0f6514f37a9fb6345bdcaf56c974ac84bc3dcf07bcd8de440a093b398af",
    "signature": "0x4121de77688569a08e9573440c9467325021c028f8cb6315dbf24aacf3ca2ceb4a7a49c65d737e8caf5a0d7be8d095348e52c03a4126b586a3c2d085b84686f21b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}