{
  "manageEntity": {
    "action": "Update",
    "entityId": "750904605",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc3badcb4c02a89d1e3f043ecc9beb73c644e5877b981a4a97fea71303b371ea5",
    "signature": "0x424cfd5cbd267d5da713fa315c5191c951af57f5ae61e77c8c2e99612b59c00c57b8289a48bf9421288dfbd9ed41a54f19ab5937d0e66bc1fb5b84ddf189199c1c",
    "signer": "0x20bCEf037EaAF1Dd5a2087f70684bCBa68eb5b83",
    "userId": "750904605"
  }
}