{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x49e8756d15c416d2873cf397ab640446e3d5d6bf66c8db0c3a792e784b1d6b54",
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    "signer": "0x89436Dcd5742EDA8663c8D5FB952947E79ae4171",
    "userId": "157593161"
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}