{
  "manageEntity": {
    "action": "Save",
    "entityId": "688682725",
    "entityType": "Track",
    "nonce": "0x47b76281539e511e3dd319b917f232762d7905f6652a6bd132ab1f1a6230c4d1",
    "signature": "0xd52aca5fd9796be129c2fec1af468124272ea4c6c948c058cff3a14f0b6a31150a1a5c19dda03e9dd6b00ca76982f7f8b075c3c711394e4f3a41f683f05685051b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}