{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099731551",
    "entityType": "Track",
    "nonce": "0xe0e799ac0a90501a3a7b3455880c3de2193ffce3d2af27fe32f5d6a81b78e0db",
    "signature": "0x7679a2b98b1ea1c4ec6710fb20162819977101a97a00cd9fd40294b00b212fd22555d8257533049f35d278eabe794f64f4a6e3b14a3f3faa852e71ce2874ba011c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}