{
  "manageEntity": {
    "action": "Save",
    "entityId": "923299403",
    "entityType": "Track",
    "nonce": "1792322956535309875",
    "signature": "0xfd1c8095ca6830a46a421877c8062e394d6b64c08812533f6d05a3c06fee72b85c97f89a84ebcb143a6ab0b7435b7da0743417c6df7d2340187ee7534361b3661b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}