{
  "manageEntity": {
    "action": "Update",
    "entityId": "518752535",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9f721f0ec19130e673fea18cc477541a21d3f1869cf9de5506a9babd92d86e8a",
    "signature": "0x74015b0f9c71ffcbe9593db67a86c88d085bf2128874ab2d0ffaed76c13bc1f95cbb89d418f6b3d3718ac6512ecb81d4657ceb2b24503702965e59156b6c96af1c",
    "signer": "0xb0d555a3bd382070FBB305CF4C389A6F7b3B0544",
    "userId": "518752535"
  }
}