{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdc28ec237cef7d0b828c65f0991ea860936c4ded54ff34fdfd379255cc823ad3",
    "signature": "0xe68fb1cd7fde87641665e68804e7695d38e0629e05f7ef5d314520e5fe366516185183eaf031c198cca50df440e725c42604c1efdb07cce6a3861a5d262e4e921c",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}