{
  "manageEntity": {
    "action": "Save",
    "entityId": "346399361",
    "entityType": "Track",
    "nonce": "1785583488989496493",
    "signature": "0xb73c7695c9d4708c7011faa46df4b5c0b58d22f24a22c9485bc58c1f6c1bec7445028ea21b3df791370aaf6b79964d9b75fb6cd128fa6199fa3f77b40d1f5c461b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}