{
  "manageEntity": {
    "action": "Update",
    "entityId": "198349786",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0472a9459be2995e80f98858d6525b9f9778f5ee4d7ec27b70b792a61c3f0ea3",
    "signature": "0x51f56c1f0491f960de3a3b798d7f8f3973407a0b498961aa06e20d89564a07c611bcbe0314fd3a44d2f9f5b3588827a40a4b5044f6fea33da4e414c482f685f71b",
    "signer": "0x4f9be0d066E6eFCB44D55d19a6664D8B24087255",
    "userId": "198349786"
  }
}