{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xab0e4986ccec4ebabe655638667f2bc0ac58245007099bfd0f91ce7bfecc460e",
    "signature": "0xcd9d9e29224fb9a484029801dd6e1b76d321a057d50ae3e25ae6ce62b08c032014066f7e7fdd02124c1bd5bd38f8a3aa7a26628a50fd2f9d42ea2b3ae9754af61c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}