{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcd01811a2339e1f435a9aacb78d769b981b8a383b90b3ecdc53246214b4dfc65",
    "signature": "0xb8224e7b9d4b186619692a49db18936134b333b77ef38dfc6de32e89dbeb89fe0338d9197b3854054303e5917db1f0c9aba411e663e6f53761756cd10d4d4a391b",
    "signer": "0x4845197E3d84cab882E02366dE4741C091E21623",
    "userId": "806235853"
  }
}