{
  "manageEntity": {
    "action": "Update",
    "entityId": "473911971",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x21328071c7a19e6a0411a02fd442ef12e38a755203b001547d62e0d2134a1cb7",
    "signature": "0xc4d8a9f2d51aed39f901023a984f14c3586ae4940083d64e6cf65efbad1aa8a5014e57ea6452ddf02036c23ef395abd3cdec7c81dcb88bc13ac9b540911b2e971b",
    "signer": "0xfffF643204D053ae5bFC296Aa20F15313084C719",
    "userId": "473911971"
  }
}