{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd084471a8e9cefd56db6e915dd425d51516b2620a89987e592671819a2753500",
    "signature": "0xc3594a32d1560188599d093703e64fb91224833c8d504e2ffe7ae001c6b2d1387cc784dd4b6eb2db4390497cb4607c1968e38696118d1bb39903a9975bbc09041b",
    "signer": "0x6f04C187ccb2ebe59052a3167b693fB276d7cD70",
    "userId": "449044166"
  }
}