{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x03c1aa51c3993bda9e343a0efa37b5b8b0bffe1c1c8c4661b0ba65f6b762064a",
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    "signer": "0x02dA426eb21fb91c1B813cD4C419f9261730Abe9",
    "userId": "424871665"
  }
}