{
  "manageEntity": {
    "action": "Save",
    "entityId": "1325861831",
    "entityType": "Track",
    "nonce": "0xb31fdc535aa2c8b350786118ebf16f1fe61ee0b3a11b4472fc707e00fbe07889",
    "signature": "0x84efc5fdd7cf36a078b21b03d768f6046d87581028ab8c7889e95da7785f4b9a6f493fe7f9bf59ad610d2ab8708669492c401fa9b42db4492189cfd7e347f2e31b",
    "signer": "0xe9B3548997c57545A6352D16A021F6df1a01747f",
    "userId": "616597835"
  }
}