{
  "manageEntity": {
    "action": "Save",
    "entityId": "2058372443",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x018e16ca84ceeebeb5ac2b3eecc00faab280d6471f2fc31a793ff8ffb428e928",
    "signature": "0x145d5e362d8def58750aaec6155da853bf05c6c29eab8f452cac067b5d8821831e3594406f64fa0dda614ce3779119c762716777da453b6a339d0bdf222b32161b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}