{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4199951a947b9fd93b1b22ed71b943aae6ca8c89199477ffeb081cfc97adb9f3",
    "signature": "0x98857ffceb26f7e62c8856bdbe83387b5b62a2847b54542e0b571b981f074cfa04b974a6bacba48b5554f606e122984af5ed28e6915a88c2e16a0787cd6280f71c",
    "signer": "0x19Ef7aB90A425646F24020D3b88Fd21BC2ADb4b9",
    "userId": "438301978"
  }
}