{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2eaff1422e3cfb68e26db140b268d69ce3a4ceab2ff69286ac4a9af693e67036",
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    "signer": "0xd0a859CF2624a008D7A044Fc8d234f7A34024587",
    "userId": "917830143"
  }
}