{
  "manageEntity": {
    "action": "Save",
    "entityId": "1877382842",
    "entityType": "Track",
    "nonce": "0xa925bb29102ce08e9d70c118c2eb01fa86e05c5aee7192d5f32c77753ada7d5b",
    "signature": "0x700340c5f933950386a9aef287f288f1f74cb1b834edba5f0759ad61bb27ad56419b88342293d24306fdd4ef14a9ebfe5235b1d3d2b5364e967238789885c1241c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}