{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x29b63b371d3b1f7cdb1c7e358bdcfc86a2089f5ea0aa49f368c4512449c86943",
    "signature": "0x284f21971b7b1dadbfeb06f9699deb5c6b1ee6fb8ee8bd94359736aca4f1af36041e7d5512fc66bf72aee42ca7f095e501adb3f4fc38b292e414cad93f02ea151c",
    "signer": "0x4D72d63bB6108D138AfaB7171b6099BC6c3d5831",
    "userId": "692340677"
  }
}