{
  "manageEntity": {
    "action": "Save",
    "entityId": "144207",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2875b7542e85cec8777b1445dcfa2e4d69c11a8808c434905737d2abfd2a5d93",
    "signature": "0xe670b4ca83c923a8058e703c9eb1caeb3944a58888647a11f3f89623af89112b470e6f25711ab9d2d921a7e900973870aa8a2081f2cf5c2b870e16f7ce87d4de1b",
    "signer": "0x6F272bE0cf1929131937536d1E57b571a5bEd994",
    "userId": "477662771"
  }
}