{
  "manageEntity": {
    "action": "Save",
    "entityId": "747060",
    "entityType": "Track",
    "nonce": "0xc6c34d90ad0813e3945107bd556e1926102749c5816eeb9db213ee17abdcc3f4",
    "signature": "0xe0e041f2e1aa00a2ad3e0a117cced6a2ff8a6fd44c2e69bdf38c337edb86779f5c62f08ccdc2924f10b8fcc9dd7a1431b777816008046474ee856b30043b81971b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}