{
  "manageEntity": {
    "action": "Save",
    "entityId": "1005864348",
    "entityType": "Track",
    "nonce": "0x1214db7dd46388ff3c3c8de0fd07bed2ab0011b26dc2df57163c17a89ba0a530",
    "signature": "0x9da57379f565aa59f861665056f798feebb5431268ee0c173212b155669f22d074518b1def36fa3eef6a7d7cb5ba57fc8bbf8b62677d922c69c7d6b18ff796921b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}