{
  "manageEntity": {
    "action": "Update",
    "entityId": "499031899",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieramqq2eivcg3wolz6mvvkvaclzdvyie3vuqfimhhaciiwbmh6ihcqa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":1782177892},{\"type\":\"playlist\",\"playlist_id\":315116408},{\"type\":\"playlist\",\"playlist_id\":657354066},{\"type\":\"playlist\",\"playlist_id\":1255879094},{\"type\":\"playlist\",\"playlist_id\":140294347}]}}}",
    "nonce": "0xa104f3537f9f27274036566803ad8c34ee5c28112843258181272f993ea49586",
    "signature": "0xc66e410a73e345113b63e0392d1f289c91ac284c79fefee585a834757d1b46031eee61cf2c5fa20c25f9479ddd99e5b6f649318ad2659a050a58ca831da2b7991b",
    "signer": "0x19150FDAcDb37660CCF281ebD651B85b2f362021",
    "userId": "499031899"
  }
}