{
  "manageEntity": {
    "action": "Save",
    "entityId": "2012565165",
    "entityType": "Track",
    "nonce": "0xd1bae47423a1d0ca7bc0f8f03bc1ee9bce5cd153cba9bb53f376b75860061d6c",
    "signature": "0xbba59e3a4f4d936d52c4fc151124be59b89a20d02d0f1b7ca840295bcedaf2215982da7735bb4706000b875dd5b76af46b15cde88bfd7e7087cea31fcfe294201c",
    "signer": "0x56e1A1DA7e462EAb52B3A45f6605f1bbfe0D1858",
    "userId": "301637"
  }
}