{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd0e4e042d548131def7eaabddabdacabea473d3179b09b74e3d46845216b6c41",
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    "signer": "0xeCfBa8420cdA4c01c47d94f247dcA6F2Db44B7b7",
    "userId": "842213503"
  }
}