{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742774854",
    "entityType": "Track",
    "nonce": "0x02d6e6d4f63f6f86ceac75b13ec27b5ce2d2283299dd9d30a053ad0001b09b1e",
    "signature": "0xb669c60549df56339ae2436283f1e1f3dbd48a30c7773225e7b0fe423d31eaf6481fd18bae2c8a700f4b2b7cfd134c743ccd2e4de5ee50af1a6732a872e3e9d01c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}