{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666291164",
    "entityType": "Track",
    "nonce": "0xb07b37402985927ddecf197a9452900f8dad13c7e7439b1b72c9e02afa1bad1f",
    "signature": "0x256c00574f85c88b1a938f629674b4978209e5c4c2724edf78797617fdad9bdb59f4bb83334ca55b0b1ab9fb82eb0ba2c3dd0c27d0c3055bf9ea9455f02f01801c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}