{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x30c112ffbf36d036b29146d4194f8afeb2dfe9349e0ed9618ca66bc6811fb383",
    "signature": "0xf4a4004ad317064b6d2951b2ea7c9fbbf047cf2f2f161d495ea8f40dbb4cbb2a303a83749c71383b8d2701f82d990671913087ae691daa5a6226da60ca5ae3581c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}