{
  "manageEntity": {
    "action": "Save",
    "entityId": "306789127",
    "entityType": "Track",
    "nonce": "0x7d7cf0ab830c910a4b4ea7a502c12ddeddecd761d0b22bca69ca2fede23440c3",
    "signature": "0xd1085f7a2cffbb3b297bf93451c49423bed174141354c338aa8677558c78192d18d69906c9a4b4d83a8de99ce8e1e73c6801a5409e15edf5d5c2d81f2ec987d41c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}