{
  "manageEntity": {
    "action": "Update",
    "entityId": "308100838",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa81059b0f494f38dff88a1ecb304d4e95ea55b8d50a9b76872be4dc48ed7b6af",
    "signature": "0x16c15c59cc9423b72bf801777b6f9e166fb4eb3a4a589b66181b9565f78b1d5a7e9ecafc0e212d7eec1068b173a3b012e315a63e189e29abce737e7a745cdf771c",
    "signer": "0x87e4380306024d22309CBb70efB443AC8aE372Fa",
    "userId": "308100838"
  }
}