{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781420165",
    "entityType": "Track",
    "nonce": "0xdc57ed7d62de788d51eab5b3b6151830c1733449cac663891939fa9e2d3d856f",
    "signature": "0xfc875b1e3b0aaa64bfb9a611e150b0f922e62d787c2b757c2126561a9795652244121b80b29942d66f3d7a9356dd1642cff7b2565263f81bf7c3d00ad648d0971b",
    "signer": "0x2FfA6115FF92dd6217E6dD473e4CFb9904Ec39D0",
    "userId": "891252308"
  }
}