{
  "manageEntity": {
    "action": "Save",
    "entityId": "903583887",
    "entityType": "Track",
    "nonce": "0x3d84a254953ad6d0f8138ed2d6aea3b69141fd8d8c6453d77ac63eb954e8902b",
    "signature": "0xa3556ee1d72b32755a32cee8790889f270a262696d7a35e96c79c4ed69dba49c012bb913a76cd48afb0c2def810a516f0661d6a653e7f0374f76f47c911ef44d1b",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}