{
  "manageEntity": {
    "action": "Save",
    "entityId": "272410988",
    "entityType": "Track",
    "nonce": "0xd2f807c77f03dd607b81e45c73898cb366cc7f18c1cb1348c53e60e6417afc04",
    "signature": "0xb37e39934d1b9d84194f5b7b22226a0578196b62d18d73b1e956ae722f2d94f8705378667aa0a1c31e1f89f6aaf2a0b7c262ff5b21aef685db85b248ebd87dd81c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}