{
  "manageEntity": {
    "action": "Save",
    "entityId": "386336",
    "entityType": "Track",
    "nonce": "0x9de692f5a7bfd2177ca145705ae3fe27218a21d010833f8bf7a045c07c28d644",
    "signature": "0x078292beaa7c1b82dffa56cba1d5b5147da1d8458fcd4f08830e857351e6b8ee5f7db02ab107d755cd2b3c74b9763ea37d42e660660b39fd1df68e37341f56a61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}