{
  "manageEntity": {
    "action": "Save",
    "entityId": "1634396222",
    "entityType": "Track",
    "nonce": "0xaa7e81084ecc8f0749d233725c129633b5aeacee7accb7613d1ca92c07250b0e",
    "signature": "0x7ea5e7c1e5c013047d470ab9724d0afacf6e3821b4014289fbda8d7c23aaf37e6edf6e3be1bf25abbe8f084144fe802c881c7e97325dec585221b6b2c0d778701c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}