{
  "manageEntity": {
    "action": "Save",
    "entityId": "169048",
    "entityType": "Track",
    "nonce": "0x735ec538c639daecc0ff1bb29031361853b6c50864d27510445d9990809248df",
    "signature": "0x4d50b0e8f4499494dec758a1bace7ab37277230c6b36694d50bd15a8583b776e24b68ccf265f7229cf8ded77b55169e167383a4b4cd91e52f110a3f9b5859cc41c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}