{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6fee343f6dc67e14df62a4e3211915743ff5c9fac35854a6298102b71ad38fe1",
    "signature": "0x301bb2c3051cfc38fdb7a533ee097a7e60267a36145ee50daa6ecf239d14d79116265644fffcc80ee2e8ba21c110ad7ea0bc5a62b137d610c1aa8077f84b08f11b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}