{
  "manageEntity": {
    "action": "Save",
    "entityId": "123799215",
    "entityType": "Track",
    "nonce": "0xc137a46d3025b7cc8eb644e6f0e9a4dba763b233b481d47a5bb8ac677fb86d45",
    "signature": "0x1641ccb4c71919a08ed59098a24de024f02b647c5af9dd5d4edacb139b46aeef3b54824f0462911831b95487ac790b83d8367b121471b50eb2ba0e29dd4ac4a21c",
    "signer": "0x7ceA71B4A8C4013A4f57c1A57eC0430915572e86",
    "userId": "31724295"
  }
}