{
  "manageEntity": {
    "action": "Save",
    "entityId": "173714755",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe6fb7f23958d2af4e29f03a72248f44320a6de0d10ab03cdfeb82216b47b49c5",
    "signature": "0x66cc39bf46172d37ed3d2f5e4f2648e59b02c763cc710536abadb22dd9ca73666c1187d075a7a9cc05b9b4f60630c2f56264e1292412dbe79ff83bcd4b2fac111b",
    "signer": "0x019ff76C6e9072A7b7ee22fC684b4B989b8ea3b5",
    "userId": "775276681"
  }
}