{
  "manageEntity": {
    "action": "Save",
    "entityId": "596421083",
    "entityType": "Track",
    "nonce": "0x6da92ffad2ed53a82d3c2d10672bc87e7a8c104a8c0a62965021210b45468c9e",
    "signature": "0x9796d084a4e65988145d7b03027a548daf21dfa43d031d070650f2ba2bada1914b326d6ff31e53d0dde6bac103055b3a6373014321a6c957596a3050017537be1c",
    "signer": "0x1A0e34aBD5374BDd677c5de4D5D9718089cB05Eb",
    "userId": "644286186"
  }
}