{
  "manageEntity": {
    "action": "Update",
    "entityId": "520846963",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x67406dc1ed0c84c154ab0e41d346c1e7e5e423cd58b5e8a8e11c5f8bb6292fe8",
    "signature": "0xd7082df31da19bd6b79280416ea4d56b468e8370c42635b885abeee9084fc4d23a0fcb78235251975b6f0a8f30f3354d33bcb1fb478babe874f90983ed913c1f1c",
    "signer": "0x2E841a9E2372464aE0aF894b022ca5FC1EdD2691",
    "userId": "520846963"
  }
}