{
  "manageEntity": {
    "action": "Save",
    "entityId": "954467",
    "entityType": "Track",
    "nonce": "0x322b060bb3df3fe886d0aa7b183da76369a8086d043ab80fa2200fc03b40c518",
    "signature": "0x31cede394c301a3884ca42b03007203884d94028d778e80ffe9884861f70ecee3b8fd2e4f8c997a69acec89d7342860a8164e47b5ed2508f754d624006ca16d21b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}