{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174854123",
    "entityType": "Track",
    "nonce": "0x4cc2f05f7a31013be0ff1acf6af00a2b90eb48b383858934faa2ef44a0a2af6d",
    "signature": "0xd50c192c7f77ff70bb675b23a9029b74e071ed9787c7a24d3991d55282265b5805658f4074d4e6346eac807adc1efba7b070c56f47a586775f76df4f411f8b721b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}