{
  "manageEntity": {
    "action": "Save",
    "entityId": "470828414",
    "entityType": "Track",
    "nonce": "0x22ee3b0a49aa71c2460c5c6d254bccc2d90ffff601b845b635496fd8d6ffa6de",
    "signature": "0xa6f5581c897f0e60d56631c8aecbd7e494ac87a36264850218095507d319f39968ff82717c665ff3d7cf581665709e9fd7fad5d2129d80c19ae3977e99befa561b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}