{
  "manageEntity": {
    "action": "Save",
    "entityId": "715960408",
    "entityType": "Track",
    "nonce": "1794240297432347273",
    "signature": "0x486e9e524064a179fac680494196b3bc780ec4fa09e2c3812da0dafc73a0ad86252071a4af333bbffa3b89cc55252de6dc38ad6efb24ac6dd82310df168fb7f51c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}