{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x44a6e24b8bf84ff23167c464f8bb4c806b67d33d979d8d917527acff62484654",
    "signature": "0xf18c5bb185a6507f89e253bf5419b8735af9a02e72cd98f078aca5ba4612f4ec1fab9a5c39b1d7c91dd1de0034e68bdae472035ce7a9f010ea0d0bf743831f251c",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}