{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c34886b04ad586a7377dfa9a26cbed3892fa4ce0d922746a4e9ae2cd40f1d0d",
    "signature": "0xade861c2b2600599cda256632b552d1ae213b22b1a9152d5b520a31847fc6c6b14068c11cd326beaf728f40b85ef0392bfc39ee4fee13c4abc23a0cec1c848761c",
    "signer": "0xC17740061c7Ebc3162F2e168463E2787Fa792618",
    "userId": "448893310"
  }
}