{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896053714",
    "entityType": "Track",
    "nonce": "0x992b7aff88b1ae6d3a9952765b2f62b8bf1134a55936ed96d4de80aa24b6aba7",
    "signature": "0x9f7aac4e41049ff85cf9daed7c799bd2b33cdc002125bed8f5b5b35aa15e9d25582f37ea46718351cd003bdf90645a278cf3cef5e58a4615f9a98cb2c7f78fe11b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}