{
  "manageEntity": {
    "action": "Save",
    "entityId": "331042613",
    "entityType": "Track",
    "nonce": "0x83acbb8850579416f2201e85575820d26de20dc40c0a8d5bc55f377e9c3793c6",
    "signature": "0xd3204aae2dadaac10ccb39a60a57f431c9b9d094ba2ce9be9230ebaee8cbbf892b6c2afea5b17a8e773934b93208768525d32e5a4d7f6e6625bb8f9a395bb3851c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}