{
  "manageEntity": {
    "action": "Update",
    "entityId": "138655938",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2d6ea3579d05029cf8a1a5329757cde428e589fa1a7245044f750182b8c22853",
    "signature": "0x28928bd26d03850dd6eb2c82902bf7bdf052acdd2bd636072aec26ae4493678943b2240f880333bd03d463e48079b5cf7238982194566f2e002c0a9ff71b43fc1b",
    "signer": "0x87f8538D39d3B2C6ce4d4343De4b6Aa2d5e75676",
    "userId": "138655938"
  }
}