{
  "manageEntity": {
    "action": "Save",
    "entityId": "984615",
    "entityType": "Track",
    "nonce": "0xbf675a33dc6687cb1c8d6f85c5a91e260680f79bf7f951b2735d4b5f7f031984",
    "signature": "0x4c4608d725299cd90ad0ebdda6943c3e7ba0674f3e7d7e831ad8bd2f1dbd3d3d60297f9eaadc2234a601a6e67bc3378b0f433ff787968dbe779ab71a6e6b83ff1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}