{
  "manageEntity": {
    "action": "Update",
    "entityId": "755651302",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xff30ed57d663f42bd2e196024ce1636c68399f036dc0ac174796a09dd29ee35f",
    "signature": "0x69975c9bc5f1dd9ff1b2df17f6795667a491d69c5560b760b04f297a5f4f3bc63deed8538bc42744749c94c1c1d0f490509002523380847b552947e923febd901b",
    "signer": "0x9cB833243e283F89D7515e148f9C1bD6E1B98581",
    "userId": "755651302"
  }
}