{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67fd6b49d8b427e306e2219a551ccfe7a26a1e12eae4ef4bbab15f90490e498d",
    "signature": "0x97e41c6eb7ef1bfc51e6c1aa91ceb81fd021e2e4fbab5f863bca4b00a04d81fb2491194c20390a241ccc8290b86fdaa141c21901c2fac634adb0736af2125ed71c",
    "signer": "0x191A921fB1E29C06eA43703831E40e484b09d557",
    "userId": "187420095"
  }
}