{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x82ff44eafe6b7ddf5972efeef99d9afe00d9e129be9894ca320edb222aa4c693",
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    "signer": "0x9B48044FBE000A8aE0be20753cF413B87aB1063F",
    "userId": "466597581"
  }
}