{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x770855130b8679b41c55d8d414484527ae565d27c78101ce26aeb5116f320838",
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    "signer": "0x6CB0a0F30c69F8b34eC94f22eaf19AB7d4f153Bc",
    "userId": "367904250"
  }
}