{
  "manageEntity": {
    "action": "Save",
    "entityId": "417303178",
    "entityType": "Track",
    "nonce": "0xcc8cea14206711da4cd818c59ef5a366e1dc5cfe9bf60ef1a26d569998f7d510",
    "signature": "0xb98d68b26ea9c4286d5da79b25d7dddd700739ae2ff4a4656fa127bea6ee6582709f7c025bb249a68e92fae8848302914df623c09ba59e502ee212f407d701221b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}