{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfd3bc0f4d1f64223ef70bef3249eedef16dea41eb3ce0cd853b42ed6279e0c26",
    "signature": "0x2c029819a3ddde2c678eb8ee664321262c1ab5356676b5e639e8cb978150f8f46d0cd032563c0e3323032b91b1f59639ac6cce07aed4bbbffd8686f101f229241c",
    "signer": "0x982F30e13aCd411fdDB6e273FFeF1e1F38780a64",
    "userId": "993944575"
  }
}