{
  "manageEntity": {
    "action": "Save",
    "entityId": "260738988",
    "entityType": "Track",
    "nonce": "0x9c34fb6bcc3eb0e26b63adebb6ec37ba48e70ab7627966423ab33f24537c4dcd",
    "signature": "0x825433a239114591a4e144f73910c3966d3bb67ddd2381bfa0248dc84e6906b628370ec736510c9eaeb68e5b071f4d25d82428a07bf4114c24a975cba52b6bf51c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}