{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb13b622944bed74263117dd9fbe44b90eaa2fe6e28c6daabe8f52908b65c242e",
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    "signer": "0x1660172dAeFe07C6cf5B9B55523A06207e6680fB",
    "userId": "461907036"
  }
}