{
  "manageEntity": {
    "action": "Update",
    "entityId": "603553289",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8f50b83dc1dd776c2e80575cb7c6c623f8a66cb5720b27b09bbd8c310181aa15",
    "signature": "0x4ee0cbd0c537dc352216684d1302efbcce3d932fc747fde726cfb887951c465b7425ab7231c3b63fb6b83124b783b6c983c2d1ba199ea4dd429e3bcc2a87e6ff1b",
    "signer": "0xEe161b4a841AAb3460dEa48e7E9d0DF4517b18bF",
    "userId": "603553289"
  }
}