{
  "manageEntity": {
    "action": "Save",
    "entityId": "368632220",
    "entityType": "Track",
    "nonce": "0x4b6fe862a2d639475bd554bba73e4822f1f5df3b4a7c68178672fd75d3666cb0",
    "signature": "0x784e47d4ed8362eae3bcdb94ca238b99023e2e5049ae6ad05482ae82028d3083693f00714dc39350b0cb12a2ce88decf437fc1c9c9a2f733f626606e477749fd1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}