{
  "manageEntity": {
    "action": "Save",
    "entityId": "81268",
    "entityType": "Track",
    "nonce": "0x8fea3900f86368105bec72cdcba39a8e6e280a4c85cae419df733052d5a0532a",
    "signature": "0x05281a8000c832aae1fca616c6f25dd55ab6dbe3dd7e456d453a9cd41265ff97509d525e346b1c878ba0aa715edba16a258a447067d983b7c54e17666edbb58e1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}