{
  "manageEntity": {
    "action": "Update",
    "entityId": "854973001",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb15e52ccc9d63cd5c2964ff9b362700ec058bb9211d1ff6570a93ba4d8df6e07",
    "signature": "0xde88179066cbe9ddfa5b51c9cb76360898ac9ded4edd019795c9aa8b898c04c02718ea36247826a985ec402fbe513f866c0916b2bbac78027566b7b20ef6f7c41b",
    "signer": "0xDB1529DAEb2cB5c0C5d2dEA55094A5c58c08df37",
    "userId": "854973001"
  }
}