{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038731472",
    "entityType": "Track",
    "nonce": "0x5de8a51bcbaf36262c5cd9190f450a1d5c114bfcd1c8efb5ea924226773b7e3f",
    "signature": "0xbdbc44fb14813e631fffe4635a5232afb4b6592842cf6ab5592aa25c82937c7549b105d1a408721f1400316cbd0b62135acfe65dea1ff312b257d2c932394d9a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}