{
  "manageEntity": {
    "action": "Save",
    "entityId": "632726930",
    "entityType": "Track",
    "nonce": "0x3d03b8f4e5a3d5d75411485535c095ba1aabc4371cd62fac5689f3b52a70c8e1",
    "signature": "0x54a397e5dc295610fcb8973b54cf0091185ed6375a01b0f466b3bfcfbe1609fa31277921b2fb84aedfd2f9ebaa772779199059552957cc8c1488b4efbd9c13391c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}