{
  "manageEntity": {
    "action": "Save",
    "entityId": "2085979405",
    "entityType": "Track",
    "nonce": "0xf9b8a38bc335e8229b553aec98d80d7d035cf6e4c51e0372ee917022dbef778e",
    "signature": "0x8b77e4a39f54220cba30d8dd666980e74e898fd76cc873e4d6cfbd3f90ccd09737548e0e094519f0d2fb420c00df8f2487ad325787c40cd5caa59eb5c5b2fe9d1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}