{
  "manageEntity": {
    "action": "Save",
    "entityId": "555354977",
    "entityType": "Track",
    "nonce": "0x4a12e87667ada4d7cecff15e5d93b0f24d8f3ac9dec6a17d85011104e8a733fa",
    "signature": "0xa266f723f8403b47340570c21070771bdd7414b27d0cc19e5ae5ebff1e8f4aaa22370c93fc3b887b4e0dfc876709ebe1754b33b35ff4396ddba2ebd8d6c7de3f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}