{
  "manageEntity": {
    "action": "Save",
    "entityId": "250936",
    "entityType": "Track",
    "nonce": "0x1772e723bf5c1c81273a446ee18b54d951f514e3c979523f8e7588563c6478e9",
    "signature": "0x9c722669c2d7abe59f8785219dbc8e0affaefcb7c0c3d1a291ad3f91e8e2373168e53982eea3ce776552acb5da09c0a848696c3c8cb34ba88e2e06b2db5b679b1b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}