{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd275bf40a9c7ad59dda4cad76071a720030e40235ca4ce6d0251c3fa7792dbf4",
    "signature": "0xdde187288f919f8c9a5cbad10165473bcb7204487fc0d6e4025f985c84159788309125e44a19e6402dadfc7a02b43d3ba196b40aa85080ab597852fd9186734b1c",
    "signer": "0xA6D1EAD37Fa2365cf9B7325dfe4fDD47e071dE84",
    "userId": "294642511"
  }
}