{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5eb419775f20501c9103b0c3313ac26dd7ec7f1fbdc70d5917151e7c1970fcdf",
    "signature": "0xc2ebc5e1042ecdd73e5edf408dccff3c1d5c577a6c3c304d1b185cccbe6f84f97de547726a3f47cadbeabaf9bab43ed430572b2d46aa22d39a08a38a704587481c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}