{
  "manageEntity": {
    "action": "Update",
    "entityId": "121355263",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa9e081b69d1a0c3b8de7bfffe08cafc102078fcfa68bc0d5556dacb3bb985e8b",
    "signature": "0x27d4eb014d95139a6228df1a1c6d02e318b9a73a9797a01c339d2be3c6c5b18b0ff83d2768dd70d8b61263a5ea2d714be206cbae12d29a762d035ef3e3a59e0a1c",
    "signer": "0xf5D2994DeDCDBfea16EC02bC7C53819B8A9978C4",
    "userId": "121355263"
  }
}