{
  "manageEntity": {
    "action": "Save",
    "entityId": "575649234",
    "entityType": "Track",
    "nonce": "1791840085047118748",
    "signature": "0x500ff13624fa256563eee929f0a531db5975b40fa3df8343dc9d4742d29a747429a1b7d8c505dd586081d127a4b179b7565c7ee1ea4f5b842e5f133ae66327061b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}