{
  "manageEntity": {
    "action": "Save",
    "entityId": "428876",
    "entityType": "Track",
    "nonce": "0x06343141b1ab246b2d4d419f0b129565540346a5b14382d0407184db352ddd9b",
    "signature": "0x642646cf5c6123d365573d0e0ed488a876b0c6bf75daf642785e1d107a7ecc163eb3ffe5eb70173ea1513d04854454857f76626982b59d2721700f8691b356681b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}