{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x48a23b07efb1c8f2fa6eeb6ad19a1130369b75df8be635513651d4f8cc0fedee",
    "signature": "0xff8ea3d058aeb0b1891d74d0ef40152557c1633a030c91f9682ebd0d9207156640d29e2b0977fe8602cf2bed3538e82b080f994fd07af215624608de60a08d711b",
    "signer": "0xa6C9cbbC3f798CE0cc732F04bb2d73b10a0a0A82",
    "userId": "71468076"
  }
}