{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x381a227e59d0df98db4d11c9b0a6b798201744f675041a2c7736fd5e4ae531d9",
    "signature": "0xb841664e09862856a00f17a6f773213c6b882ba6f83268f07d61c86e946db0367e7438eecfa9d16b235ee30f2ab18c908bac1f68c606e6e1e8681b5c5af5a9971b",
    "signer": "0xD04B9Af842d7EF33ca555a6aE50FC6Ee08E1Ff0c",
    "userId": "361863287"
  }
}