{
  "manageEntity": {
    "action": "Save",
    "entityId": "742768257",
    "entityType": "Track",
    "nonce": "0xb17e201cec14cb3664ed5133df7df4d47ec7c726468b3e51b3ab11c047498290",
    "signature": "0xbc65ab0de190e30edf60aa5a05d70c6ad91b7851ac2e100180b476afd8b9f8114258134a51b1fb02ea36d064a142862a0e8ffa48d1c62541f2b9ae7d47b41e411c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}