{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x352be78c74a60713bc0393534427639f092f06b69fd1a8c9e588afdc31183a98",
    "signature": "0xfcc3fe9e08ee502807c466076ba6a7dad10f26e3005d3f612626c7643c9661c1215f8ff06e4d2fcc5f7c94c861931711ce58762bfd768fcf5461c374d962999a1c",
    "signer": "0x31bD11C427B52Db08B5145212FD90Ac4d00A1F8f",
    "userId": "361508277"
  }
}