{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7a8284e5ccbb370e64723cc6bd8588c1f43d94fcb49870bc9de3e1d33f048735",
    "signature": "0x3e7294588bc967ac16f77dfff0ad9b2406b486419dec5b85a12f106e6c429fa5389fc6d5fede62e291211c7af2847e58fb7cdfb81fd89fb17f31527d5e8c488c1c",
    "signer": "0x6A04f796d3FE3fF8FcDf6F829C26158C3b6253Bb",
    "userId": "67092615"
  }
}