{
  "manageEntity": {
    "action": "Save",
    "entityId": "1066622079",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc59a2bbb4f8bfead1a240e11276069511f85d183445991cba69ec4e8bf40566b",
    "signature": "0x1951c3bb97bfec3a63d6fa451103508206fc11794d4a203c3cc9b6e71df103c429837a4216d127d7dda255deabdd503dc0a2c767e5dae317cdc190494ed631c31b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}