{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594256407",
    "entityType": "Track",
    "nonce": "0xdfe3bb9aba21625b98ab4a079785d2f25665ef26c47257071572dc1c600f8d1d",
    "signature": "0x7fb8c82d4bd6947d6b2290ec42c17d3a23bf786e21daa06083fc7aadad23a6e0409d4d0bce41af88060e307a797508884748973a7c91054a30741c2d0307cedd1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}