{
  "manageEntity": {
    "action": "Update",
    "entityId": "608405710",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x90e68a39ac4d7153682a804f67dd4fcc5edc051d061b6e05a97e1c0b18054210",
    "signature": "0x0c82c2a357d0f0edf63a928ce43f4c6fe36131664177672b5f49da696f0db27b39631aba8254ba9f1e81a2c9bf22d00c6c9ff9622261ba1c6d3f6e47f2e66b531b",
    "signer": "0x993948A04d74C801C41F882e0Bd7D73d28fB5D79",
    "userId": "608405710"
  }
}