{
  "manageEntity": {
    "action": "Save",
    "entityId": "1647824232",
    "entityType": "Track",
    "nonce": "0xdb0c377d3fe14c530c7580169324a065102b2a459da2e3e64a4e673ba9cb3a63",
    "signature": "0xfa50d00b8cb4b956ae3360ab55bb08cfca5d34945feb28cdc25d424a451dc683742f727b66f00ef2333d30cf58d9757990b8c38b204f6c9570d300db24b9949a1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}