{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x54432a915a1106ebf66e4971f9a34a1ae4d56256e523b8829e12fb105a6935e2",
    "signature": "0xc17fded32659b8c68b02d027b8cfe543fe96918cad378d9621c06f887aa6221d5995bd2121cae8292cf9160a92328369dcf8249fc76ed786a810da846c241db31c",
    "signer": "0xaA9eCf4b968DEE734232DB11a08f40F64DD83C91",
    "userId": "729182803"
  }
}