{
  "manageEntity": {
    "action": "Update",
    "entityId": "504638765",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa96a6128bc8d70c2b722310bfc373d8d9ff3bf2636bbca8482bd0cc7d5d968fd",
    "signature": "0xa9fba1816355eaece8f1b7ce0f3e2cb10872a1de20340d22df8569560e5d5c1d37d3887fb322c4d95af849b00909660624b775eec9f46198ff1d200684c830d81b",
    "signer": "0x2074DA70847E2FD612f95Cc4406C88196B85DB56",
    "userId": "504638765"
  }
}