{
  "manageEntity": {
    "action": "Save",
    "entityId": "544482",
    "entityType": "Track",
    "nonce": "0xd3d1e82e45f12db1e65c29fa32287b23dc62e911116c5a05a5d7471b15665de3",
    "signature": "0x140edc5118293b62e162e896a0ca5ad48fdab79d534f04fd9694fdc8224111c64b362cf048a33b549f8d222a3b5e759620f01c44175a6f3ab3b639a294592c941c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}