{
  "manageEntity": {
    "action": "Save",
    "entityId": "214781",
    "entityType": "Track",
    "nonce": "0xdacafa48419892f6e6e1adb76dd78c92571cfb31c84c9d1f53e34922703c427d",
    "signature": "0x4224a9ce0add239f151f75f84522de44fe91c6b243dbcd2f783d4a06b87e355d6f539b5f802d3145f769897ee8817846326e944b88495e8d046d03ffe7a95b661b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}