{
  "manageEntity": {
    "action": "Save",
    "entityId": "246671743",
    "entityType": "Track",
    "nonce": "0xaf8cf4f3b13d5475c4c766c7320fad8e2d215026402fbb3d7b16199d43d9be26",
    "signature": "0xa7bc81594a32e002a9fe504f57c940904d025c7862e4fb13df873c99ecf9501f142b63fd7d47ca8f752a698028efed03b9b05424452fd694b0ef01d594d664e91c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}