{
  "manageEntity": {
    "action": "Save",
    "entityId": "1334050521",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5da01d1dc17222fb3611248faa611e6186019191ce4fe7f3dae06ac9e5f3f8e6",
    "signature": "0x980bb917d14340716ffb0159c8cc7c37586c79969b2e401b3be64d87940fba2b7174d8262e421109f161fc09d19adf6ef994f80a02e9e23d3f73491470d5b9761b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}