{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073898",
    "entityType": "Track",
    "nonce": "0xee1dcc0b4760ed3ffbd960e4f320f36e79e6a8c58216132a956f127cdd746b58",
    "signature": "0x68ccb94f40a96b66b9a358d687de59ff616b4ddcad87cad25445a4701cf5f812263ec4bc69a10b5e57995060a607cce26f83590da9c8e189de64bf2ac01b21601c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}