{
  "manageEntity": {
    "action": "Update",
    "entityId": "508846613",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x25036c23fe8c3d77f54256e63c293d4c079fbd529df8bf5e2ae0d611afd62d85",
    "signature": "0x02207e166503178395d4eaeff18b0113cc2af37eca382682b1d0d0f387c881f906a6bbdd024af57c1b3486aad02276531d274197f5f9580caa8084201a71447f1c",
    "signer": "0x9b4847489D5c9512cC64E671001EC3cd21722170",
    "userId": "508846613"
  }
}