{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x05770f0521bec40f646c6155dc5ce3714c7c0584a1056992ef4fc856a483cc67",
    "signature": "0x18bee1aaab8082d7a1235a5bffefa2c3ca6aa99f3113735b18a6019d2465fe4d6c38c5e4137b498cf4e7191918310b4962424b1757095b2bbce95a4ed873accf1b",
    "signer": "0x9F7407300F7604EdF94E182822e52fe5db39F907",
    "userId": "317912774"
  }
}