{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xea600ca664e84e3e221a2a4398c707493ec02bc36d73c71e1152586c963776af",
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    "signer": "0x4E9AdEAFEc83438bD9F729f649244bFec8Ca2D94",
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}