{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x80b13f58962a538cf4c7a68fe6f9f32a468c68c7be6ed53993ca2c617636b775",
    "signature": "0x0fbb156b52c973e2f97b8c1b63a0617d7194a469b82f1368b744d15d5f0af8cf4427e8d4ac429295b3f9a5c68f9ce236d66e774d0cefb61ad71ab51c2e59e0291b",
    "signer": "0x80F600fdBf6F40e78069849Be1C2b4f379F76adD",
    "userId": "118123141"
  }
}