{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x19fb33cc0d0392b2b67aa41ea3a49c173db4638361f64d1533c390bdcc133825",
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    "signer": "0x83A2898fB51Cde052267945741f071bB38E84E73",
    "userId": "480081204"
  }
}