{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4fd09f3011e3c582b6d3fd02f250479f159dc27b300186f852f67d2f0c1f4fd1",
    "signature": "0x0b2dc33aecac34399d1bdb751e8679558757e1daf3bf9bbc9d3326d7f72bd427003204e8e4860c2f1f51281dc59c1dcb80dcae0c6d66335764fdbc13d91fcc6d1b",
    "signer": "0x755A40a2C84a58DE10409331A5FC677b9596d249",
    "userId": "887603006"
  }
}