{
  "manageEntity": {
    "action": "Save",
    "entityId": "2009234786",
    "entityType": "Track",
    "nonce": "0xbc54065cc60261468dd39a8b960a76b1cc999c889cb520447b2213dfa450e5d8",
    "signature": "0x032df95653b9058bf95249ea584cb5f97d534c09828bd5844039fa0464775bf517d62a50f54f1b07ef440be902dda71cdae4255222109b13e96af2225e18a8df1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}