{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1b2261ed2139d02563673a6910414828c582d3bcdf1c65af179308721b03bbe4",
    "signature": "0x5e2b1de63f64788bd9d6fd96ffb2e31d2dd7c9ab6bbbe343f9e95e18cd521eaa4ef98e2148c0372e598dae46385068a5b7b8598d3e287f8a63b81345219e44bb1b",
    "signer": "0x98daE37c16C2d825f19272D227D509C135640a90",
    "userId": "334235250"
  }
}