{
  "manageEntity": {
    "action": "Save",
    "entityId": "733726",
    "entityType": "Track",
    "nonce": "0x4646c34c2d4bdc26511df12c3339416447cc58ea1f8f17f0a287cf1c570ed4bd",
    "signature": "0x36b82a4b7204a1c48f143710359a28fa1dcf99130b83aa7d95bc0618c3ba2522641134f79e80fd87b3b6caf8bc2f0e5f741e22d3123b708afd0f5f03117f4f7e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}