{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x304a37e0f9ca2daff115ec6a36bafe148209040a7c1ecdd02839d02ed595cd89",
    "signature": "0x35c595c07663fdf83e67a18d3cf5899e9d801c85011d999823c0e07f2c6196ed62e899c349a40530ec1f4523a90455c0a6dc1a464b4d9a38d866e602ce6e95c31c",
    "signer": "0xBe7c9E7eec08ffa2F93A94340B4E2fa4E9f2F3Cc",
    "userId": "923089606"
  }
}