{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x20aacad50536875e07edee1441810e5c6cd4eab8b028e19ac4a5439de4415a44",
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    "signer": "0x877D195E0F5Df3506016fBb0fb1b1E26e65B203D",
    "userId": "508153670"
  }
}