{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x852cf356cad1f43b37e4e761655bd389c820094502b4777fd95f82a522dcec29",
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    "signer": "0xa9fe1c9E5623FA85000577B1dC63d64D5b81Dd57",
    "userId": "605573660"
  }
}