{
  "manageEntity": {
    "action": "Save",
    "entityId": "306005284",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x138f30fa108a21f49e516c7b7d7402f28336d6c3b3faa9a9e85f6d5b760fb798",
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    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}