{
  "manageEntity": {
    "action": "Save",
    "entityId": "766611132",
    "entityType": "Track",
    "nonce": "0x4a880a5a1f79fca10d478e7c397a0981095c5330583740584d2b32af2018df18",
    "signature": "0x0be1bcc9538938ca62479b4a1e526356d0c052ddb45ff5a88f1e1472036a96971f6da5370350b73fc0c84e8d39271a88f65d8f3cc8062ac12fc94c1665a89bf31c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}