{
  "manageEntity": {
    "action": "Save",
    "entityId": "828497626",
    "entityType": "Track",
    "nonce": "0x6db256aeadef700bcf2a9089f10f37eaa97c92b750576c5590cf37d0252e89b2",
    "signature": "0x2c54c0140ce51ea5388a8feedebefa6a11c06f11cdaf000dbb0404bf8880784367fb79acbc067cc836a82b70e294170e192dda3936fa7b6af26e54a1667bf4471b",
    "signer": "0xc4A500E17D812B285447720CCcb7F8eB148c91bd",
    "userId": "256479919"
  }
}