{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ea3cc064f06fcd9f4e98bae58c7f670ace38db628c59d123b8cd2506f999d32",
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    "signer": "0xA5A7DC346AB808DF112C171aD08232Ce0906F446",
    "userId": "512549047"
  }
}