{
  "manageEntity": {
    "action": "Save",
    "entityId": "325383",
    "entityType": "Track",
    "nonce": "0xafd399b11ee01c2033959a54bd9c7271ffe43c8daff8d279e602a7f41adbf562",
    "signature": "0x24e4bbfbcec97fa0431db792a09af97d6e1110030c9a6169bac53df6e0e33f7c36586fc37d4df261a8d25d386771f25feaf48b3d6597f5d90c02cd0e537b1ebd1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}