{
  "manageEntity": {
    "action": "Update",
    "entityId": "621534741",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7vcsllamb3iovvemsc6zyhj2lht6jtw5sc6zlwbb7poxk4rhwbwa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1165258217},{\"type\":\"playlist\",\"playlist_id\":1889036717}]}}}",
    "nonce": "0xde5fe80f170e424978238d21ee1306112816019cdf6296a70a7956d0de2b2961",
    "signature": "0xea17237935978e64bfe8f6679e468d1c532f52d89992e8bd60314e85548642d1134c4ac2a92d5777e097794967e4c50697809628ec2842865913fe27d95e5eca1c",
    "signer": "0x7c9023569D0688566422657303CC9788011C2a7d",
    "userId": "621534741"
  }
}