{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf842d1925e109b230c7d58c5264f0650deb33f75e244fed9ea1ceeffada6edca",
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    "signer": "0x3abD2Ab0E86E439F2c9F25bC848152f0CA2F98E8",
    "userId": "33641458"
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}