{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xacecb2401fe07e870e6b2f3d8f413596365c84f5258a95a3def8e92f318a7127",
    "signature": "0x443ba95ea15b824fe6f907745db2bfa516cb431c53e7891f9ac8ca26c8b534d84f26527859689863c4b39b69bc58ccd3c4417b45130d8217422631821cab10961b",
    "signer": "0xeCAa5e2f11Ff4dDD97251Dd86224f36193d82eae",
    "userId": "663264551"
  }
}