{
  "manageEntity": {
    "action": "Save",
    "entityId": "353470422",
    "entityType": "Track",
    "nonce": "0x599b175cc336b96808a6efe41967b13e049366b665a5c5f9a17ddca263c70753",
    "signature": "0xa98d4ebff30ef598dc394dd991d7afb60a451247048a2efbab1948cddff4965520aa67342d15a98018f4b9c78711a8f65c7e4410a509f3559a86b558a89010991c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}