{
  "manageEntity": {
    "action": "Save",
    "entityId": "880594503",
    "entityType": "Track",
    "nonce": "0xf0cc9a0fb69b27a18326dbf993aa4c31b58979ad7e2c9c3f56e4277bb25f8c75",
    "signature": "0x0c864276cdc3f12186f4b727fef1f35cf515f6c0d5eed017109b6d84e00317c2747ca618a7d096c29d3677cbc24ff8f8c37a882474d3d07791e30afc1dda45cd1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}