{
  "manageEntity": {
    "action": "Save",
    "entityId": "363605710",
    "entityType": "Track",
    "nonce": "1786798651460839437",
    "signature": "0xb9494e5495c397746f9cb2f5ce7764f4f96f1abe1bb2e306a65efdf243d76e3e4e7f25c1b73f5e3bf92a32b85930b4d5e1494d69c8f4b60d2893bbecf94a0c1c1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}