{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb9396bd8a8e25b24f4a997712772f8b4c3b1249b254db3e16aa1eb162df292d5",
    "signature": "0x3a48397b63eb3942a8e153f8516120248e385476c6659aceb362b2b2c7141f822f42f9bb5281238b02beef7d9903cabe6a3c1dcbee3c34e54557fdac2bb76a621b",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}