{
  "manageEntity": {
    "action": "Save",
    "entityId": "1005886",
    "entityType": "Track",
    "nonce": "0x305a1e6b268dedd5610d801db55b123538c49d09041800a3e9b42e32683c5e09",
    "signature": "0xfdc160674e957ca669decd5052c1411310619f1b4b9ddda9098be177e221a9a307c0197895bc74549780816e180405a4b9ac388f5d67ccd9a1d4de53edf06e951c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}