{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd928970fcf084344303fdb494d10345e94f0e5f56c849dc2807104d236173a4b",
    "signature": "0x62c0a25249fc08cbcad78ee6925ca0dc608495c59cb2c7fbdc857f1606431004260ddd1818acfa6e3d2ba56254a28f63e6396af1c6d139585e5471b33bd9bd501c",
    "signer": "0x5014C4C1E59E1e73EdbeD4B67aB172a636C10747",
    "userId": "365911367"
  }
}