{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x844c3def2c811f2b1b13aa9ca6840775cb5851587aa9c59736afd8ec787183f0",
    "signature": "0x5e5f730f8e2ac82c09af51129316b1615fe245249647eb0bad38df7bd6e0ab267ab00adde37cab040ab76d4bed8cc3491308f2049f7836271279c1aedec849651c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}