{
  "manageEntity": {
    "action": "Save",
    "entityId": "335304978",
    "entityType": "Track",
    "nonce": "0x3e20b3ea7827673865f87b61eb5e33f836d7b163e092588825ae644424f33a28",
    "signature": "0xce491be8b0198e150c4ea7e60bfc3b588aef1ae9bcea48a7778658d381c07bb24e47fa0a4dca88182ec393103520b790fbff09965b28f676ffffc0f2397bf6ce1b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}