{
  "manageEntity": {
    "action": "Save",
    "entityId": "480245",
    "entityType": "Track",
    "nonce": "0xbd943cdb344595f10d62a5489f4952d07a13e9918b00ba7afaeda51385cceb20",
    "signature": "0x36673636fed4f294de94102bc3f88f11684da08595e64f6459e7bf6f04ef82392e74ea33bc536cadf6aaa7a70478141e321fe0538902ffd80453b7b9085316aa1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}