{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb94af176bafca10f4b7eda9ff5c01c9295bce3877552f8db67a909e74196a79a",
    "signature": "0x912414befb833d07eb072f8a0bcef359b0ff325960bd902c38ecc4098850af910f39c04accd7d3e5018b3ff01652a1e7eb2a72797619a3d98a458dbea280744e1b",
    "signer": "0x3A2C2d6B2b96B324aEfe2Fb682DD70531b2De7d0",
    "userId": "328274267"
  }
}