{
  "manageEntity": {
    "action": "Update",
    "entityId": "210821345",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbc7166e9acb2637187ca6a2bad667c41f1d7713b09196a887cfc0ab0925a93cf",
    "signature": "0x9bf379e5fd89088c794e22c92fbc7ff23e7f1bd98b56eae8cb6c71c59beac12071c499f1349dca6f03875a84a0857695766fcf1991a626711f0b3b2a184a773e1c",
    "signer": "0xa334Eb01413ADAa287901266C48515fC4FddA8Ea",
    "userId": "210821345"
  }
}