{
  "manageEntity": {
    "action": "Save",
    "entityId": "1921023231",
    "entityType": "Track",
    "nonce": "0x6eaf6403df27fe5cf8fa3d2b7544b7864e0c4804e3671987601e9a3ddf5ac55f",
    "signature": "0x96050c7712c1dcf4222c14e726d19bd6f32d9848123ea0c106dddfb6e7bf22e85b18915c264eb8a0a309b584172085fe033acf6fac7fa812847d2a716413e7b31c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}