{
  "manageEntity": {
    "action": "Save",
    "entityId": "1423211136",
    "entityType": "Track",
    "nonce": "0x48ae491ce7a153f669e3ef15704dfb63fb85e96ffa7c579da8bd5cabfb2d25c0",
    "signature": "0x927b471b13062c23f3aafcec46d5ca7d0595060d8e5b466a8d6996eaf9f834f353654e1f6a10201c670b6ca6c9e42b9db36687cdfc59842d1dafc8a7f4efffaf1c",
    "signer": "0x5266D3bf68599A3ba87A93975F4BCEf460822B05",
    "userId": "875250649"
  }
}