{
  "manageEntity": {
    "action": "Update",
    "entityId": "539136535",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x48a6e11a8d97f650ea338fc67e22c77179a5a04b4e0ee1378d8680225101597a",
    "signature": "0x49723d2edc631a2bf04b925bfe4987771e40a2a0ddcf626b6b1970246b5e90d514e0dfe0d8b988fb16d7cb61f0e0796a149d077ac34a127d6e147cb63544969e1b",
    "signer": "0x9F1ba5048fD5fF69319Fd398E4e181b46451aB6b",
    "userId": "539136535"
  }
}