{
  "manageEntity": {
    "action": "Update",
    "entityId": "643976014",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x31009972fa3ce914ae937a5b6979b8515e0ac9123b44da6e2c30e0e7e1faf90c",
    "signature": "0x5a37bafb78b5d3bd11e8da2234c18d84d2d1805969bb7b36d6197429f1db28712ce3441555ea251496de068df55139c8b55d329e31deaf60d0b17c0a877405a71b",
    "signer": "0x434E6E903F887d1123e2415651292ED71aC170Eb",
    "userId": "643976014"
  }
}