{
  "manageEntity": {
    "action": "Save",
    "entityId": "4938",
    "entityType": "Track",
    "nonce": "0x225c33a5d11ccc199c181370fcfcb23a5610e7406179d5e60ef1fb937c34fa9d",
    "signature": "0x94fa1fde2492518409d6914b35c35cb644ee2602ec8868150ffc87777153eb1e5ba94276ba050b25aebfcf18c43798f254b07ecda6ddc09a2b59d7020b8072671c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}