{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d0b75f1983add75bd121d45620d807f9f13b53d9ce5840eebd32c0e4aed1b1a",
    "signature": "0x68af8f5c58360b09cdb6b0d9b906084099e5b7729f9fb9fa3e2b49407db0b44f27323c7ec6dca422c52f08ca9459008a7b32812cf9a15f1050ce898715bba4761b",
    "signer": "0xDe538Ca1BED3a78494574e2d57a4aD691Fe9485B",
    "userId": "826172471"
  }
}