{
  "manageEntity": {
    "action": "Save",
    "entityId": "339704762",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7d71b1f82500ffdbec326adfa8734abe0c5425875df64e4d5e5ac451f5ec343f",
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    "signer": "0xF2c19977A72e7f63bBbD9063748E52c002b22f6b",
    "userId": "957488166"
  }
}