{
  "manageEntity": {
    "action": "Update",
    "entityId": "421654712",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf9eea075b47a194f0f9af0451af1a0ca34dfd3aa69069af884dae579f384dae4",
    "signature": "0xaf2f1432f39ba127534fd70d83e85df089cf669cbb8242036bdcb1357fd333825b29fc6104a36091bbecebbdd79c46fe436afa4b38b5d27d3704f6dd4416e13b1c",
    "signer": "0x9389EeeadB96012E95139B302a0B50BF7fD75D55",
    "userId": "421654712"
  }
}