{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685740650",
    "entityType": "Track",
    "nonce": "0x2777a75a6b9b3f9c34f435f1d61e038d72e14a83795a5addff0136fc969d4c71",
    "signature": "0xccd593c8a3da4b475430ff70c684c173b899305cff0d7305147f7891537ad79d39fc48b9dec98d758368a4388796dfe585640c4c83554597bdec6e95adbfee1a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}