{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699504794",
    "entityType": "Track",
    "nonce": "0xad920c84b9d895742436c5c972205d17bdeb3c2a2b3824ba589ac58aa98d98d0",
    "signature": "0x397bd7ac3c02fe6a6b18b1b55ad27170491f35b8359ecfde55420087366707ea102e29f8471e7acce0f2c2aeb1262845f1bece9bcb831675655f9ab9c607c7911c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}