{
  "manageEntity": {
    "action": "Save",
    "entityId": "1306388078",
    "entityType": "Track",
    "nonce": "0x66de88b06fc5259c747f5d84e59e884d44817fe48d508d5ee4637349ad485fb3",
    "signature": "0x0ae5023396b76b888ec7c3bb1a6d3d80fdc43bfa27533630cb9cd29ebeb6e34524f8e133e012e919f5987ee5e3e296015f0aa9450c9d2cb6bc61a170447f1b261c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}