{
  "manageEntity": {
    "action": "Save",
    "entityId": "970571253",
    "entityType": "Track",
    "nonce": "0x268d42102bcc137f68f80a68573523ed587a635990e51d2cf58f8fe5b99c4cce",
    "signature": "0x78bce6bd86d618f7035c40d2fd7faaca488174a24beafba3f99c197d6d2aa2d37aee2d8c28fb760e221e1c75a25c46ea8c6243e97fb4f6f9290770db276c45501b",
    "signer": "0x1A99bcEb1277f1d90Ffa77B2c480Ca93a4a4ebC4",
    "userId": "852344394"
  }
}