{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959250216",
    "entityType": "Track",
    "nonce": "0x269581bc46fec16188210df1401eae0683aae85c42a33e556eca5c6f02ce8bb2",
    "signature": "0x31a4ff63ca170013748436df2bfb5e185fffda05b977127fd232f0ff3e62164d00e78dd1c69939e93428928d1ef54aa37e1e728c22b4a52cc16777a1fe6e870f1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}