{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf426ce2cdcde8b2eb18cc06033666f174c64202ee1622d1d2eec8a8e40b08422",
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    "signer": "0xa550fDFd14255Ffc54bd99d354CCE2DF00461Dfa",
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}