{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098349710",
    "entityType": "Track",
    "nonce": "0x6ac66491100487b28f682f7d1ba0f9afe61cb95ebc0fa832cb6ddb74e0fdc0f7",
    "signature": "0x9bb5b435e2a7717ed0398ce2fbf70c9105ec7bb97e322d1a120c585fb2ed68fe158709172e337b36fd5172f3f57e18a56ceb1f8f1d0174db58f6ca8ecd221d051c",
    "signer": "0xf63b89A0Bbc03C7ec59aC257C7082A056082cDB8",
    "userId": "558452493"
  }
}