{
  "manageEntity": {
    "action": "Update",
    "entityId": "513956582",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd273cecd079c721066369bb964b94b5bf9857230e98bed9dac786673587a41c1",
    "signature": "0x04d55e16b4200d17a8efbbcb802bc5420ed447bdb2ff1aff40c02874c993f59051be913a39c86971d520ce456ae0aa94ac63d19d3bfda04aeff003f75dd21e4a1b",
    "signer": "0x4b1A8281F6C7611C75f6c44f1D3B258B0143F613",
    "userId": "513956582"
  }
}