{
  "manageEntity": {
    "action": "Save",
    "entityId": "471247",
    "entityType": "Track",
    "nonce": "0x1d4bba1cc8462e445b9256b0471b3fa98c14e98fd45f09e126bf40393a4f13dc",
    "signature": "0x688fffb2d128b756f1271bc871d947374ea8683ba3342c8fe50917a9124d00310e00bcbb6456e3697b3e168f2a2ddc8f8cdf999077508a7e76d9703c5e1ffc381b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}