{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd382442ca2b0524ff7e699aba78dc541398fd596c57cdb4480b2b3ff3dfaf8d9",
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    "signer": "0x2dE0fBa28eB08e93130FD9206EDD888b60f7694a",
    "userId": "74259061"
  }
}