{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe70186b83d415a3479defc9b49defc5ea52c91739fcab8fab928dbfd6aa67240",
    "signature": "0xd3f39ad805556180bb618ed65b21b4330bbeac60330dfd721c4d2ecb617e5d9b0715cad306888a91b995d7c55c814617058da8d26c376668b1a565f4b759935a1b",
    "signer": "0x019Fc3Af93628FBDf041D601CA0f3B1d108735df",
    "userId": "677998924"
  }
}