{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4036fb650303ba4c776816a17c88e735fd514f2c6e67195900e8377de4fd7c94",
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    "signer": "0x075964F7BFA3756331d32632921930ca2a6F5a5F",
    "userId": "551890545"
  }
}