{
  "manageEntity": {
    "action": "Save",
    "entityId": "25045628",
    "entityType": "Track",
    "nonce": "0xc882e4a5ac24ac4b9a53834f9b65a56a4804a0bd945f3b8c9774415765b8b6dd",
    "signature": "0x852a806788dc10dce352e82f6c837867d9824395c2dc37c110200f31ff01628410159de6748154acb5ff487e9a4083b37eef4344d883915e2c6872039bfa49481c",
    "signer": "0xd367754F1CE503c2D28B6793582BC23fD71eE997",
    "userId": "420647095"
  }
}