{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6166b9fd7ee2e2a00ab41bbe558d94236b7363a1da4b5adebec26582c4a90c58",
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    "signer": "0xe459D401C9C3231D874806BD7452788f3a23A4BD",
    "userId": "739997749"
  }
}