{
  "manageEntity": {
    "action": "Update",
    "entityId": "487781531",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6f95c361316789276c7e7a6bbdc0ae83d1362ced7104383478d2432b9cf4e166",
    "signature": "0xf7e6b2073bc225e17fff02cbb6bc391c5dab4d72b77c86a0d56be7a3f477ddc56d93aececcaae2891020e1f5f667f91d6a27f7f894f4e59321ccacbe1c9640b11b",
    "signer": "0x75adc2A133575527B87d56CA442911D4f02b7B52",
    "userId": "487781531"
  }
}