{
  "manageEntity": {
    "action": "Update",
    "entityId": "449208082",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x243510ef290c587d9be97f0bb483e3e3cdaedda649977f826b2d657fc27579f4",
    "signature": "0x5791b2a43347e4a30757600a32e68c9285939aff966639d4fd9c0f1faf70a8cc3571a9585dd72df506cdd2658e743e40bb8b1b41f9aad8426071c8d48dcff3821c",
    "signer": "0x1c2B7030474cD7eD157833aCbA6053665090ABF4",
    "userId": "449208082"
  }
}