{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x52d511356f578016b16e149ff5350df01ce31d986d200a6b1bae25d9f91c6437",
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    "signer": "0x517d1AF393EF63F241D26dA0f39bB82874d5eb16",
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}