{
  "manageEntity": {
    "action": "Update",
    "entityId": "678533360",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x78f5f631fa111a8c85b5ab25e10828954dceaf2675a58e4267d971001f2655fc",
    "signature": "0xf16073069870c3400b45c5fb8266443237de5a020104db43212a7bdb2e8879c42155db744b70a6091695f2d5ffde46a7914a0189961229e4d48410acbeb0d4451c",
    "signer": "0x7F7038819176d30f877ED9a42633Ef96354eB386",
    "userId": "678533360"
  }
}