{
  "manageEntity": {
    "action": "Save",
    "entityId": "248704781",
    "entityType": "Track",
    "nonce": "0x5848f78909be86d0098499425b9a5c25e28a5fe9c9d90abf7a342f6b7bec61cc",
    "signature": "0xf34d6960d03ac8dcfca5feb56ae3bb08192f5bd258fe08115ea84b7ddcac1c6b78e4a989f9490121fe62da5ad58e5f323c350c63ce9bb7482d7d9c57811fd3401c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}