{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc15a6ecdcfec57112393257112f027fffbdae733f82df64ceaac3b7aff935208",
    "signature": "0x16d3152d94b092ca3b95a92f52779a963da8e34bdbaecdc7934e553fc6ab774920caa003976235ac04f2a9fc060149a6190038b33265a36b0fc32f5a848402771b",
    "signer": "0xE35DcC5C816D790A9f730B4696F43Caf64d5d1e6",
    "userId": "603916020"
  }
}