{
  "manageEntity": {
    "action": "Save",
    "entityId": "841698766",
    "entityType": "Track",
    "nonce": "0xf24666b21f5bdf3bfa235692ac36c2937a17b50512c7cd14e825e9c680036e64",
    "signature": "0x42870ee1bdaf8a12cc68db3a82fe76a1abcce2af69ca93d6087e450f02ef26da19f60b1f7d8f1929c54b6341927b9d0a6df8b862b746e77d00313ffc212d50671c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}