{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe8bcf5a1ae4e264171092f24e9dbaf8f633fd0ef4f43de36a6b59fabf03d8cd9",
    "signature": "0xe1108ef15e7f20469cf8206beff44d132d3cd9d77eab6c02db45336e6696769b001a600ee68617fcdd35450aafd71461d243af3b3fae6e5e1c4f2e5de64fc9d01c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}