{
  "manageEntity": {
    "action": "Save",
    "entityId": "1952053403",
    "entityType": "Track",
    "nonce": "0xfacf3e25353e0d6debe96b29a73ea752809844cad32eead6836af195f55f426e",
    "signature": "0x320ed4f8c919b1b502affca58f14a95dfe3845bf2d7056cfb27135eda6bb5aad23345640a499099323ef8100fe3000fbadf26f2932213d97973be69db4f19b231b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}