{
  "manageEntity": {
    "action": "Save",
    "entityId": "489611",
    "entityType": "Track",
    "nonce": "0xe174c4912f7f090a88e4618f364e52d7d45fb79ae24916f66126c5d7c7d66e65",
    "signature": "0x97f3391169410686b6c12989ef09099b4a7104befb4fd9ab3db07295abfbd81e5294bf0ccf7eeb236f870051bf795810370108c29e1296224dc07707884f7cd31b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}