{
  "manageEntity": {
    "action": "Save",
    "entityId": "432152",
    "entityType": "Track",
    "nonce": "0xcee6089297fc541e687ef30c3659c0d7402e6d823f9b9217adce4e5743ee438d",
    "signature": "0xa402de6577abd885139bdbc7f5b633878f451a21df41c726c017efa0d903fcba52c3b75c3e91e10e9f3048a350f6da7996ccc7b35efb4093c9fe37706972ec611c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}