{
  "manageEntity": {
    "action": "Save",
    "entityId": "715113416",
    "entityType": "Track",
    "nonce": "0x440f8569814fc481ce6939bc5a9dd7a08ccfa0918a0966d70b28a8ac0882ad18",
    "signature": "0x8d639abd1e70e0a4adfc75a42fe724de0fc47de370947cae5ed8adfcb56bbfb9466c0455003bda97295f96717ed4c1971984fa3c5494be6da1f548985f975d591b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}