{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834272822",
    "entityType": "Track",
    "nonce": "0xd94b3dc12622d08d10af601ec9ca5cf4b7968c573b715346c07ad2ff339eb1e4",
    "signature": "0xd529f2ddce8d3a897d841c0852859fb3a2a30c5d7012ea10575d0ee9cbcc9fb1113856caa505f6d7056c1e8fb550c89ea868f49b9dea54efb68ec3238d6f5a641b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}