{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7e91039f58690e3a9d2a85aa7e03f8da8cfb646f8a249605d9a161fe4d09a577",
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    "signer": "0xbD185B7c9bc8B9205be401cffF0718b9905D950C",
    "userId": "435630935"
  }
}