{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5f9f1296fdd40cc6564ae070e24ec661168df73d7740b91e79daa711a16ca537",
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    "signer": "0x54B67bca93C518f6faF3fc07161a07BbFB9C8130",
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}