{
  "manageEntity": {
    "action": "Update",
    "entityId": "400923052",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3f3684c2a01496296843db69be24d801a067148caea3f94cf7ff493cb662a4e5",
    "signature": "0x959aa5a5a64ab4ba618fb5a71a90a0513f60aee9dcab79ffb2c4c4aba712680a0646c303c44ae35cbcb4b4023fd2233a6358aeca06fb316a862fc9c544ec35321b",
    "signer": "0x1b8DcAD5ED837233989D4f246852f5aAdf1f61eA",
    "userId": "400923052"
  }
}