{
  "manageEntity": {
    "action": "Save",
    "entityId": "295363288",
    "entityType": "Track",
    "nonce": "0x87312955d568d47eaf85ca94906118e22ef0e072e7c4f5795af9012ca5bbdd4d",
    "signature": "0xbd31b0dd6c9604dcef889b88c83eaeeac86183cd2d3054c11d8716e9b882460b0f93ec24ea8e91ccf2e20afc89aea4db5876145556a7cf0121b4f29755c552811b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}