{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9cbac4fd2beb3956dadff92ec24b265103585f9599295a51a587b848c84167ca",
    "signature": "0x132af81b570d38573ae3ebdc2965b6b78656e82a9d89169daa12ed7f00f6aa935b9257912ced4557fa710e9ae503544f9f680392950cee419b554180f71439d01b",
    "signer": "0x2d00665Ec1AC27508FC4aEF572E680bc2091047b",
    "userId": "900342656"
  }
}