{
  "manageEntity": {
    "action": "Update",
    "entityId": "455005658",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x21537d92b9ab20533e113d85d8d644076d2e153a12afbc39a5f6584bf551f833",
    "signature": "0xc3f4b63dba71d3e421de3a11689cc7a98d622e8f7028ce758e40a8865dcfcbca2f122a274f92d2ee092b8758a7d3b02dafd4b52bb60b0aa302eb6c123d0435541b",
    "signer": "0xA9e17E71291e2694145cd86F1a6109099Ec21600",
    "userId": "455005658"
  }
}