{
  "manageEntity": {
    "action": "Save",
    "entityId": "313234081",
    "entityType": "Track",
    "nonce": "0x691b6115b921263cf3c6239d96bc5d1431c12c5d30bf9f3f7f985d81dbfb4dfd",
    "signature": "0xc2bd3b7ccb8939428a63839e6bff8bf90666b07748f75b33a0bf1585f753e1b527ba2a698a0559623c8b42de4be0abf14fd46f2bc224769dea6aabc52c91f9901c",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}