{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc121bc5f15246ad20a949da394f9ab4ddbebd64430eb053144e308e09ad9d377",
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    "signer": "0x0Bb059fe8308cB4D6cDD7d79E6b2AE72b3b9DD2c",
    "userId": "731388658"
  }
}