{
  "manageEntity": {
    "action": "Save",
    "entityId": "556074438",
    "entityType": "Track",
    "nonce": "0x33cb5b1e07b6ba848c0aff5da9c22d716c2a85f30c54da18cd50e3f17650a502",
    "signature": "0x6c922372bb4aea3ee991d8f7ffdfd61e7127a1250126af473b77059feb983acd2a74dd6ff97495ba3f9c115dc99c5d01e274e096a841b03fc447ef99b41dca281c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}