{
  "manageEntity": {
    "action": "Save",
    "entityId": "1800075745",
    "entityType": "Track",
    "nonce": "1792940776904921594",
    "signature": "0xf8e7a21d12077be2d4dfe877acc69978a9c24a5d60107f7539e767fe5248179a1cce7aa7db0613407bab22ab01fa866d36472c9f43f5986e7bbfc6e89db0bb681c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}