{
  "manageEntity": {
    "action": "Save",
    "entityId": "242418984",
    "entityType": "Track",
    "nonce": "0x94a865bb894b9ad6a4ccbb38935104dbee63e11aaceab47fcb1109944fbae2b0",
    "signature": "0x9c8b158adf9b1e1ec0a65404e74a084d294e4a1a893604d11ab6132a0a21360b33bff9a4d538a7d12d1390aed2a80423ea764cdf18d648a086c7a21cbcdd16131b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}