{
  "manageEntity": {
    "action": "Save",
    "entityId": "560481",
    "entityType": "Track",
    "nonce": "0x30055bf774920fb9dbd4e828348453d8d9ad73d53cd55b0ab001982eac7143bc",
    "signature": "0xfaea2b248819d4c531fac8647f1547c0e00e0628e866fb54cf127d8680b1809e0e4e7525eb68ba8a72a9083e99a22edca23386a65890ad3f0038121d140fc7471c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}