{
  "manageEntity": {
    "action": "Save",
    "entityId": "161889552",
    "entityType": "Track",
    "nonce": "0x8f06cf1f3e41ea3c1e12da5e5b851d10c8c2d483340fa73b1731479a75acaba3",
    "signature": "0xa7447a688524c41567681cc9635748706dc019b686f20eefc4179efda1a7151317f1c676ee707682a3d387ffb9bbc3eb0f7c8655fcefd8cb52ac2583e2842cd21c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}