{
  "manageEntity": {
    "action": "Save",
    "entityId": "886086323",
    "entityType": "Track",
    "nonce": "0x23d0a24ad9413b33286b0234f6092dd512d2de98f5bbe772a9ba29d971a336ea",
    "signature": "0xf172128cff3e98daa1994ad5db6c8d92febed568db54fc00e612b014ebe347c32eac68a4b7def22974b64efb31e8ccea1796be05ffc4b4218012ce5974f120911c",
    "signer": "0x7e0356bBF498412DF4861737Fb6Db25B329AfeBa",
    "userId": "938918179"
  }
}