{
  "manageEntity": {
    "action": "Save",
    "entityId": "470500317",
    "entityType": "Track",
    "nonce": "0xb9687be82c2cef80fac058f5dbdefef16c8fc14cf651f826ac2aaee36b066d40",
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    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}