{
  "manageEntity": {
    "action": "Save",
    "entityId": "271685",
    "entityType": "Track",
    "nonce": "0x3cbd16a6729c0b0cf422c56da609553d656675515b0afa33c2a46419dfeed964",
    "signature": "0xdc4aace7acb8419188ea416cb1892a30be20169a5143b4b1ed8df9a7a20e6910511761c2d63d9bf5c92329d917e34eb4c85b3891fb2ddeb91a755ebc3556090f1c",
    "signer": "0x21Bf75Cc555eE0A19Fefc54665189807c73DFFD4",
    "userId": "833426398"
  }
}