{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x54fc3ac54de560514a798e138577b1922fa4bc9d197d613112cd31fd99e3c87e",
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    "signer": "0xa2B06fe81fE6f6b9A3F17c00f3d6c6aC6502427A",
    "userId": "573639218"
  }
}